Fan:Digimon: The Gathering

Digimon: The Gathering is a fanon live-action film idea created by CAJH. It is the sequel to Digimon, Digimon 2 and Digimon 3 and the thirteenth installment of the fanfictional media franchise idea known as the Digiversum. The story of the film is mostly original, but inspired by several elements from continuities of real-life anime Digimon Adventure, Digimon Tamers, Digimon Frontier, Digimon Data Squad and Digimon Fusion as well as real-life manga Digimon Adventure V-Tamer 01. The film was announced in November 23, 2016 and its synopsis was released in May 15, 2017.

When Millenniumon and DarknessBagramon finally return, the Tamers, Spirit Warriors and the Generals of Fusion Heart United must gather together to prepare for the return of the ultimate force that unleashed the devastating Dark Wave on the Digiversum. However, there are several adults and a group of mysterious Digimon led by Alphamon who refuses to believe in the Tamers.

Synopsis
(Only the most important details of the plot are written in here, minor details can be imagined by readers themselves. The same thing goes for any possible quotes from the dialogue.)

Rise of Alphamon
A mysterious Digimon with a purple fur keeps watching the Tamers' battles. He sees how Ronald Yeoman's life was saved by Birdramon while Greymon and Garurumon finished off Morrismon. But two years later Akihiro Kurata make humanity hate the Digimon even more until his true agenda with the Gizmon was revealed. While the Gizmon were defeated, Kurata was able to escape until he was killed by Abaddomon two years later. Abaddomon also killed Thaddeus "Ted" Alder and made Tadao Deugchi fall into coma. Abaddomon is now dead, but the Tamers had been unaware of the existence of the Crests of Seven Great Demon Lords of Deadly Sins. Millenniumon had escaped and was now ensuring that the moment of the Descending now approaching.

After reminding himself once more of all imperfect results the battle of the Tamers had brought, the purple Digimon was even more certain that something had to be done. He then started to glow and warp evolved into a large Digimon with a black armor, which was revealed to be Alphamon. He declared that it was time to do something for the situation. He started to keep watch over Justin Alder, Ted's younger brother who was also a Tamer before Abaddomon's defeat and Millenniumon's escape.

The real world in crisis
The news programs around the world were talking about how the Network was defending the real world by having benevolent Digimon and underage people working as teams. While some of the Tamers had grown up during these last six years, there were people who were worried about the idea of having such young people fight in wars rather than focus on school and their future. This had led to the creation of Anti-Tamer Movement led by Carl Alder, father of Ted and Justin. Carl's wife Michelle is also part of the movement. Two years ago had been mourning Ted's death and Justin thought that they had forgotten their hatred against the Network. But few weeks ago they had revealed the truth about the Tamers to the entire world and therefore started the movement. Justin had not returned to be a Tamer, but he was very disappointed in his parents.

The movement had started to an important debate around the world, but the Network tried to defend the movement as well as they could. But the Network tried to maintain its reputation by giving speeches. Their representative was Sam McCoy, son of Rob McCoy, the Director of the Network. Sam revealed the truth about the electrical disturbances that had happened 26 years ago. He was only a child back then, but felt a connection with them. Sadaharu Deguchi was giving speeches against the Anti-Tamer Movement in Tokyo, with his wife Mari and daughter Yoko watching it from television with Agumon and Gabumon. Sven and Kristin Vestergaard with Gaomon were watching them in Denmark. The United Nations reported that the Network had indeed been unable to prevent the birth of Millenniumon and finding any information about the Descending which was mentioned by Bagramon on his broadcast last year. But now people around the world were afraid that it would mean the end of the world and tried to ask the entire World Wide Web to be purified from corrupted data they claimed the Digimon to be.

Discovering the core of the DigiQuartz
In the DigiQuartz, a dimension connected to time and space of the Digiversum, DarknessBagramon had found his way to the core. He was met there by Arkadimon who was in his Mega form. He said that Millenniumon would be ready to open the Great Gate of Darkness in one week. DarknessBagramon noted how they had always been one step ahead of the humans. The Tamers didn't manage to stop Abaddomon before Millenniumon was created, Arkadimon had survived from his encounter with UlforceVeedramon, and members of Fusion Heart United had failed to prevent DarknessBagramon from finding a pathway to the DigiQuartz. Abaddomon had planned to betray his masters and Akihiro Kurata simply wanted to be only human left alive but they were no longer useful to their masters. They, however, knew that there was one thing that could save the Digiversum from them so they needed to act.

Unknown to them both, a small portal glowing white light was opened behind them and a small mysterious Digimon kept watching them. DarknessBagramon sensed something, but the portal disappeared before he could see it. He noted that the sensation was somehow familiar. But then he decided to ignore it, believing that it couldn't be what he thought it was. The small Digimon appeared into a place full of light and digits. It started to whisper in Old Norse, saying that he would need to act soon.

Discovering the concentration
Theo Robbins, leader of the Spirit Warriors, was currently studying his last year on secondary school. After the school, he had tried contacting others, but only Kaiji and Kazuo had been able to answer. Something had once again happened to Gemma, Jonah and Osip. But this time it had nothing to do with the Spirit Frontier. The Spirits were currently saved in Theo's and Kaiji's phones so whatever was responsible for the disappearance of their friends couldn't get its hands on them. However, they realized that the Earth map on their D-Scanner application had detected something. And much to Theo's surprise, the signal was coming from Greenwich, London. He scaled the map screen and realized that the signal was focusing into Royal Greenwich Observatory, one of the places based on the prime meridian.

The signal became even stronger and Theo remembered how there was once similar signal two years ago. Then, Theo remembered where he had sensed it before. Right before his first interrogation, D-Scanner had shown the Earth map a similar signal in Kyoto. And then, a distortion appeared above the Observatory. Several members of the Network appeared and asked what this was all about. Then Theo saw a familiar creature from the news reports: Millenniumon. Theo immediately spirit evolved into Ardhamon to attack, but was easily defeated. The agents tried to activate certain scanner-like devices, but Milenniumon was able make them malfunction. Then, suddenly, another portal opened. A black hand appeared and took one of the scanners analyzing it and then launching a green beam to prevent Millenniumon from passing through the distortion. Before the other portal closed, Theo heard voice that said how humans can't be trusted. Theo didn't even have time to analyze the Digimon whom the back hand belonged to. However, then the agents decided to take him into custody, saying that it was for his own safety.

Calling of Eden
In Denmark, Eden started seeing strange dreams. When she woke up, she realized a strange thing: Edenmon had seen the same dream. Sven and Professor Christensen came to calm her down and tell her that everything will be fine. Eden, however, asked if her adoptive father was keeping something from her. Professor didn't say anything, but left. Sven knew that something suspicious was going on and decided to keep an eye on Professor. He asked Edenmon to accompany him so he could continue the research on her. The research had not proceeded very much, but after hearing that Edenmon and Eden saw one and the same dream, he became terrified of a certain possibility. But before he could go ask Professor Christensen for certain things, the agents of the Network came to ask him to accompany them and take Kristin and Gaomon with him for an emergency meeting.

Meanwhile, Eden had gone back to sleep. But then, a small white portal opened. The light made Eden wake up once again, but this time she had a strange feeling that she should follow the light. Her eyes started to glow and walked from her bed straight into the portal. Elsewhere, Edenmon sensed this and decided to go too. Sven and Professor Christensen tried to go after them, but the portal was closed. Sven demanded explanation from Professor Christensen, but the agents told him to come with them as there were much more important things to worry about. After they had left, Professor started crying and asked why did the moment was had been afraid to happen had to happen now.

Message from the Guardian Knight Resistance
Every available Tamer was summoned into the important meeting where they were informed of serious events. Some of the Tamers and the Spirit Warriors had mysteriously disappeared. Nori Fujima, Alisha Jones, Vincent "Vince" Haldman, Jiro Ichida, Gemma Illiano, Jonah Sheridan and Osip Ivankov were among them. The Network had come to conclusion that someone was targeting them, but that it didn't side Millenniumon or any other surviving evil Digimon. This was proven by the events of London. The mysterious attacker had fought against Millenniumon, but had also said how humans can't be trusted. It was easy to understand that someone wanted to take the Tamers' place in the upcoming war against Millenniumon. According to Bagramon's warnings, the possible day of the Descending was almost here, but without the disappeared Tamers chances to prevent it from happening was low.

Then, the screens were hijacked by the same mysterious black DIgimon that attacked Millenniumon. The being said how it was the leader of the remainders of the original protectors of the Digiversum. The Digimon was Alphamon himself and he told how he had found a way to protect the Digiversum without the help of humans. He and his Guardian Knight Resistance were preparing to destroy Millenniumon before he could have enough power to bring the Descending upon everyone. Alphamon also reminded that every Tamer had started as an underage child and how their parents were constantly worried. He promised that the Anti-Tamer Movement could trust his help. He said how he would confiscate every single Digivice and D-Scanner by challenging every Tamer or Spirit Warrior into a duel with him or any of the other Guardian Knights. They had merely captured everyone who has lost against them, because she is unable to destroy the Digivices or delete D-Scanner application from smartphones. He will only free the captives, if the Network agrees to help on the task and relieve the Tamer and Spirit Warriors from their duty forever.

Sadaharu Deguchi and Sam McCoy explain how the governments around the world were about to decide whether the Network should be terminated. The Tamers had to temporarily quit their studies and careers and stay inside the headquarters and under heavy surveillance until it would be safe again. Matt felt like a prisoner because of this but wondered if Tadao or Ted would have accepted this. Sven was called into the headquarters only because he wanted to keep an eye on Kristin himself rather than allow anyone else to do it. He also wanted to question Professor Christensen as soon as possible to understand whether the Guardian Knight Resistance was also responsible of Eden's disappearance or not. Keisuke felt especially lonely because Tadao was in coma and Nori was among the ones who had disappeared. Yoko was determined to help him to find more about Alphamon in any ways. Patamon and Plottmon still hadn't got the full powers of their previous incarnations back so they couldn't persuade Alphamon themselves. The Network had to do it by itself.

New inner conflicts
Alphamon had shown his message even for the families of every Tamer. Justin was among them even though he had given his Digivice for Matt who was also taking care of Bearmon. After seeing the message, he simply thought that Alphamon was just like the people of the Anti-Tamer Movement. His parents seemed happy about the situation and blindly believed that their son agreed. Matt was with Guilmon and felt like he needed to prove for the adults that the Tamers were not playing like children, but taking everything as much seriously as the adults. In the headquarters, Kaiji and Kazuo Komiyama didn't want to quit, knowing that Theo wouldn't want it either and that the fractal codes of the Spirit Frontier still needed to be returned. Patamon and Plottmon asked if the Tamers really wanted to prove themselves or simply give up. Yoko and Kristin refused to do that. The situation in Digimon Academy had helped Agumon to remember his reason to fight and his friendship with Gabumon was stronger than ever. They remembered the story from the past, how Alphamon was a Guardian Knight who had questioned the decisions of Yggdrasill unlike Omegamon who was more loyal to their cause. They knew that the current Alphamon was simply an heir whom the original one had passed down his powers. They needed to find out who held the power of Omegamon, since the writings in the Old Ruins didn't contain the rest of the story.

Yoko suggested asking Gennai for help, knowing that he was once a servant of Yggdrasill. Theo, Kaiji and Kazuo didn't know who they were talking about, so the other Tamers had to explain the situation. But then, Keisuke revealed something. He had already received email from an unknown address. The sender claimed to be Gennai and told them where they could find the answers. They needed to go into the DigiQuartz, a dimension that is connected to the time and space in the entire cyberspace. There they would the explanation to the true goal of Millenniumon, Arkadimon and DarknessBagramon. They would also find a group of humans who fought in the world known as the DigiFuse Zones. Sadaharu, Sam and Sven came to talk with the Tamers and they made a quick decision: they would join the Tamers into an expedition into the DigiFuse Zones and the DigiQuartz, but they must not engage anyone in battle unless the chance of winning is high enough. Yoko, Kristin, Theo and Kaiji agreed to come while Keisuke, Matt and Kazuo would stay as reserve fighters and watch if anything happens in the real world.

Expedition to the DigiQuartz
On the next day, Sadaharu, Yoko and Kristin step into the DigiFuse Zones and find the remains of the Bagra Pandæmonium. They realize it must have been Bagramon's fortress a year ago but the place seems forsaken. They start looking for the knowledge to open portals into the DigiQuartz. That is when Keisuke reports his latest discovery. Alphamon had scanned the remains of the distortion scanners and somehow used that knowledge to amplify his own ability to prevent Millenniumon from coming into London. But he had wondered how Alphamon had been able to that for such powerful Digimon. Finally, he realizes that Alphamon attacks never affected Millenniumon. The great composition Digimon who can distort time and space retreated all by itself. Alphamon has been tricked to believe that he is powerful enough to restore balance by himself.

Keisuke also finds out how to open the portal into DigiQuartz and the expedition is ready to start. Luckily their Digivices had created force fields to ensure that they can freely move in the DigiQuartz without their bodies being endangered by void or lack of oxygen. Being in the Digiversum had never been like being in cyberspace in any fictional story. They saw several windows to different worlds in the Digiversum. They recognized how one of them was different. It led into the same place in London where Theo had seen Millenniumon. The distortion was never completely neutralized by Alphamon. Millenniumon must have had other plans than straightly invade the real world. But two voices claimed that the Tamers were simply making up excuses to prevent Alphamon from completing his duty. The voice came from two knight-like Digimon. The first one was pink-colored and the other one looked like a humanoid leopard. They were recognized as LordKnightmon and Duftmon who were the other two members of the Guardian Knight Resistance. Duftmon claimed to have been reborn from the Digi-Egg left behind by his predecessor and being originally enslaved by Abaddomon himself. LordKnightmon instead claimed to be an old friend of the Tamers who blamed humans from ruining his life. In the real world, Guilmon and Bearmon saw everything through the camera screens and felt something familiar. The reason was this feeling was finally revealed: LordKnightmon was actually Kotemon, Ted's former partner. He had allied himself with Alphamon and learned to evolve into his Mega form.

Kotemon had been traumatized by Ted's death more than initially thought. He had found a Digimon named DORUmon who had learned to evolve without a Tamer and passed his knowledge to Kotemon. DORUmon who had learned to evolve into Alphamon was the one who had allowed Kotemon to become LordKnightmon. He had also revealed this knowledge to Ted's parents to encourage them to start the Anti-Tamer Movement. LordKnightmon refused to listen anything the Tamers wanted to say to him. Matt, who felt that Justin would not want to see Kotemon siding with Alphamon, arrived with Guilmon and Bearmon, and was willing to fight if it would be the only way to make Kotemon to come back to his senses. Yoko, Kristin and Matt prepared their Digivices. WarGreymon, MetalGarurumon, MirageGaogamon and Dukemon faced LordKnightmon and Duftmon in a battle.

Eden meets Huckmon
Eden and Edenmon had lost their consciousness after going through the white portal. They were awake now and had seen same dreams once again. They felt like they have been in the same place once before. A mysterious voice explained that the place was space between the other worlds of Digiversum and the Quantum Sea, the primordial world responsible for the existence of Yggdrasill. The voice came from a small white armored reptile-like Digimon with a red cape. He says that his name is Huckmon and that he has been living there and guarding this space under Yggdrasill's orders. The Quantum Sea was more than just the primordial world of the Digiversum, all electrical technology humans possessed was dependent of its existence. If the Quantum Sea would collapse, the Digiversum and every single Digimon would also perish and all human technology would be destroyed. But the end of the Digiversum was never the true goal of the Great Demon Lords. The distortion in London was simply one of many starting points to not only release the Demon Lords from the Dark Area but also to initiate their true goal. Huckmon sensed how another important distortion was appearing into the real world.

Meeting the Fusion Heart United
The Tamers were still fighting against LordKnightmon and Duftmon, but then they sensed the new distortion. It was detected from the core of the DigiQuartz itself. The two Guardian Knights wanted to settle things by themselves, but the Tamers decided to follow them. The core was a large black globe with green continents formed like the continents of Earth. The globe also had glowing webs and marked places with certain coordinates. It was the Quartz Globe, a mechanism that was originally used it Yggdrasill itself to maintain the portals. The distortion was caused by someone who attempted to gain its full control. It was DarknessBagramon who claimed to be completing his own part of opening the Great Gate of Darkness. He easily defeated Duftmon and it was challenging for even LordKnightmon to fight him.

That was when Shoutmon X5 and Michael "Mike" Hou appeared. After one year of searching they had found DarknessBagramon and the Code Crown he still had in his possession. The Tamers didn't know who Mike was but assumed him to be on their side. Duftmon mocked the Tamers by saying that if he lost to DarknessBagramon they would lose too. Matt only remarks how arrogant Duftmon is despite being a Guardian Knight. LordKnightmon tried to push the Partner Digimon aside to prevent from interfering, but then Theo and Kaiji spirit evolved into Ardhamon and Beowolfmon to participate in the battle. DarknessBagramon, however, used the Quartz Globe to empower himself and sent a powerful energy to significantly weaken his opponents. Shoutmon X5 avoided this by separating back into Shoutmon, Ballistamon, Dorulumon, the Starmon Gang, and Sparrowmon. LordKnightmon is forced degenerate back to Kotemon and escapes with Duftmon. Sadaharu saw how the distortion created by DarknessBagramon was marked in the International Date Line in the southern parts of the Pacific Ocean while the one created by Millenniumon was marked in the prime meridian. The Tamers were about to escape, but the window where Kotemon and Duftmon had gone through showed their lost comrades Nori and Vince imprisoned. Theo and Kaiji saw Gemma, Jonah and Osip there as well. But Alisha and Jiro were not among them. Mike told Sparrowmon to go find Nene Amano and tell her about that place. Then he decided to follow the Tamers into the headquarters of the Network.

The truth about the Descending
Mike was taken into the Japanese headquarters of the Network. He didn't speak Japanese, but luckily most of the staff understood English. Sadaharu assumed that Mike was one of the humans who had traveled into the DigiFuse Zones. And witnessing Shoutmon X5 as a Digimon evolved from fusion of several Digimon was enough to prove it. Mike confirmed that and explained that there were two other humans with Fusion Loaders, one of them being in Japan. But he himself wanted to know the Tamers' point of view on these latest events.

After everything had been explained, the Tamers gathered into a conference room where they planned to release their captures friends and convince Alphamon and his allies for the last time to stop both Milenniumon and DarknessBagramon together. But they also needed to find Eden and Edenmon and discover what had happened to them. But that was when Gennai appeared in the room with Huckmon and told that Eden and Edenmon needed to know the truth about their role in stopping the Descending. Now they had come to explain the Tamers part of the story he had already told Eden. The Great Gate of Darkness could be opened by a powerful distortion created by two points of concentration. Once the Great Demon Lords would be free, they will create even more points of concentrations and create the worst distortion there could ever be: one that changes the laws of nature in the entire universe. The Digimorphosis will allow the Digiversum to become part of the real world and exist even if all humans and their technology would disappear. But one of its unfortunate side effects would be the destruction of Earth. Huckmon says that Eden and Edenmon are the key to save everything and restore Yggdrasill. He leaves but tells that Eden has returned to Denmark where she and her adoptive father can explain the rest by themselves.

Dealing with the revelation
The Tamers were shocked of what they had just heard. If the Great Demon Lords would return, the humanity would perish. Eden and Edenmon had returned which made Sven feel more relieved. But he was also worried about her because she would be needed in the upcoming battle. Gennai said that while he and the modified clones he had created as new agents had merely kept themselves safe in Digimon Academy, Huckmon had not reappeared anywhere in the Digiversum after the Dark Wave until now. He was not permitted to tell what Huckmon really was, but said that he was chosen by Yggdrasil itself. Professor Jørgen Christensen said he knew the truth about Eden and Edenmon all this time. While Edenmon was the embodiment of the power known as the "Seed of Eden", Eden was the human avatar of Homeostasis. Homeostasis was another specimen of the unique digital lifeform Yggdrasill represented. Yggdrasill was Eden's real father. Professor Christensen had wanted to prevent Eden from fulfilling her destiny, fearing that he would lose her. Gennai said that Professor had no right to risk the future of the world, since Homeostasis had her place in the Digiversum. Sven sided with Professor, indirectly revealing that he had started to fall in love with Eden. Patamon and Plottmon sided with Gennai while the Tamers were unsure of what to do. Sadaharu was called to return to Japan, but allowed the Tamers to remain in Professor Christensen's lab for a while before they needed to return to their local bases.

Keisuke was surprised that Sven was interested of Eden, since Jiro was the only one who currently had a girlfriend, but changed the subject because his intellect was needed for the upcoming operations. Mike told he had already asked assistance for rescuing the captives by sending Sparrowmon away. Kristin was confused. She wanted to comfort her brother but she didn't want to endanger the Digiversum. Matt was more worried about the Anti-Tamer Movement. Their numbers had started to grow rapidly. It didn't look normal anymore. Humans and the Digimon being put against each other while the true enemy could do whatever it wants. The Tamers thought that they had won the trust of adults by exposing Kurata four years ago, but Ted's death along with Tadao being in coma and Millenniumon being still alive had badly damaged the reputation of the Network. Yoko wished that Tadao would be here with them to help them make decisions. The Tamers had only one choice: they needed to rescue the captives and gather every single Tamer, Spirit Warrior and General together to defeat both Millenniumon and DarknessBagramon. Gennai, Patamon and Plottmon decided to go into the Digital Middle World to find more information. When Mike decided to return to New York to wait, he secretly remembered that the OmegaMemory he still carried with him was strangely reacting when the Tamers were nearby.

Rescuing captives
Kotemon and Duftmon were standing before DORUmon who was disappointed that they had lost against Millenniumon because of the Tamers' interference. He decided they should face all the Tamers once and for all. As one of the most powerful Mega Level Digimon, he was certain he would easily defeat them all and prove himself to be the only Digimon worthy of being a savior. But unknown to them, Alisha was spying on them and Jiro was in another part of the caves. They had managed to escape, but no one knew that they had stayed in hiding in the cave to trick DORUmon and the others. They had even found the captured the Partner Digimon: Lalamon, Gomamon, Piyomon and Veedramon. But they had not been able to free them yet.

Then, the attention was taken by a surprise attack. It was Sparrowmon and it pretended to be coming after the prisoners. Duftmon decided to deal with it alone while Kotemon and DORUmon went to active their own evolution processes. Alisha and Jiro met a Japanese girl who had come with Sparrowmon. It was Nene Amano, the former teen idol. They were almost amazed to find out that a celebrity had a Partner Digimon, but also remembered how she had been missing since the Battle of Kyoto and had reappeared one year ago. But they had to concentrate on releasing their friends. Jiro went to release Nori, Vince, Gemma, Jonah and Osip while Alisha went to release the Partner Digimon. When the captives have been freed, Alphamon and his allies appear. And much to their anger, the escapees had also recovered their Digivices and smartphones. Alphamon was angry that the Tamers not learned anything so he showed a portal where several Anti-Tamer protesters were fighting against people who supported the Network. Even the police had not yet to come take control of the situation. Jiro reminded that he himself had learned to be an adult even as a Tamer and was tired of this conflict with someone who was against the Great Demon Lords too. Gomamon first evolved into Ikkakumon and then into Zudomon while Lalamon warp evolved into Rosemon. Vince and Nori had been freed to as well and they first evolved Veedramon and Piyomon into AeroVeedramon and Birdramon, and finally into UlforceVeedramon and Garudamon. Vince remembered how Alphamon had challenged each of them separately, but Alphamon assured that he is powerful enough to defeat them by himself.

That was when WarGreymon and MetalGarurumon appeared with Yoko. She said that this time Alphamon must fight all of them, but just one. Alphamon, however, had other plans. He opened separate portals, with one leading into New York where the protesters were fighting each other and the others leading into the DigiQuartz where Millenniumon and DarknessBagramon were. He sent LordKnightmon with Theo, Kaiji, Vince and Matt to the place where Millenniumon was. Duftmon was sent with Nori, Keisuke, Alisha, Jiro, Mike and Nene to the location of the Quartz Globe. Then he took Yoko and Kristin with him into New York. Meanwhile, the Network sent Osip back to Russia while Gemma and Jonah were sent back to Los Angeles. They were too exhausted to participate in the battle. In New York, Yoko declares Alphamon being insane for leaving others at the mercy of powerful Digimon, but Alphamon was too proud to listen her and believe he has been deceived by Millenniumon and DarknessBagramon. He blamed the Tamers for their current situation and claimed to be unable to focus on the true enemy until "the distraction" would be gone.

The battle of arguments
The politicians and the agencies around the world were arguing about the future of the Network as well as the potential end of the world. People were afraid and started to blame the existence of the Digimon for it. Nathanson, the FBI Special Agent forced work with the Network to stop the Kuramon outbreak couple months ago, had resigned and joined the Anti-Tamer Movement as well. Justin decided to run away from home once again, but the streets were filled with chaos. And now Alphamon wanted to challenge WarGreymon, MetalGarurumon and MirageGaogamon into a battle that determines the fate of all Tamers. Yoko and Kristin swore that they would not lose this battle. But as one of the most powerful members of the Guardian Knights, he was the most challenging opponent WarGreymon, MetalGarurumon and MirageGaogamon had ever faced.

In the DigiQuartz, LordKnightmon was fighting Ardhamon, Beowolfmon, UlforceVeedramon and Dukemon. UlforceVeedramon found out that Arkadimon was there as well, making Vince decided to go after him and leave others deal with LordKnightmon. Ardhamon and Beowolfmon wished that the other Spirit Warriors would be there to help them. Duftmon was fighting with Garudamon, Rosemon, Zudomon and Shoutmon X5. Keisuke and Tentomon were checking information they had collected from Alphamon's hideout, hoping to find out how Kotemon and DORUmon had managed to evolve without the light of Digivices. Mike found out that the OmegaMemory didn't react to the other Tamers at all, making him wonder what was the true cause of the reaction. Millenniumon was starting form a crystal around himself while DarknessBagramon was starting to fuse himself with the Quartz Globe to finish the ritual needed to open the Great Gate of Darkness. The distortions were spreading and were about to reach North and South Poles which would complete the ritual.

DORUmon's past
During the battle, WarGreymon, MetalGarurumon and MirageGaogamon remembered how some of the original Guardian Knights had passed their powers into Digi-Eggs. They realized how Vince's Veedramon was the successor of original UlforceVeedramon and that Matt's Guilmon was the successor of original Dukemon. They wanted to know what kind of life DORUmon had been experiencing and how he had found a way to become the new Alphamon. Alphamon said that he hatched from his Digi-Egg in a small group of Digimon who simply wanted to live in peace and avoid any further suffering than what the Dark Wave had caused. DORUmon was one of the few Digimon who were aware that Yggdrasill didn't do anything to prevent the Dark Wave. Yoko and Kristin claimed that it happened because Yggdrasill had no way to prevent it back then. Alphamon, however, said that Yggdrasill is supposed to be an almighty being who should do anything. This belief started this after all his old friends had been killed by Abaddomon many years ago. He had received a DIgivice to find himself a human partner, but DORUmon had destroyed the Digivice and downloaded the data of several evil Digimon he had managed to kill. He had degenerated back to DORUmon to preserve his powers until he managed to create a synthetic evolution light to empower himself by using the fragments of his own destroyed Digivice. This synthetic light was also the power source he gave Kotemon access two years ago. He also revealed himself to be the one who provoked Justin's parnets to create the Anti-Tamer Movement.

Rebirth of Omegamon
Keisuke had used the windows to listen Alphamon's speech. He realized that the synthetic light had an unfortunate side effect that made Alphamon feel more proud and arrogant, making him unable to listen to others. He and Tentomon decided to try to fix the formula of the synthetic evolution light, but to give Alphamon a dose of perfected light he needed to be forced degenerate back to DORUmon. Keisuke also remembered a certain fact. Mike realized that while looking at the window, the OmegaMemory started to react. Keisuke remembered how the original Omegamon had passed his own powers into two Digi-Eggs, realizing that the Digimon who hatched from them were Agumon and Gabumon. He also remembered one sentence he had translated from the Old Ruins in the File Island. He had translated it as "breaking the gold will unleash its full potential". Mike asks Shoutmon X5 to break the disk, releasing a large amount of golden energy. Most of it flowed through the window into New York.

Meanwhile, Alphamon managed to defeat MirageGaogamon and force him to degenerate into Gaomon. Kristin ran between them, but Alphamon was ready to forcefully take Kristin's Digivice away. But that was when WarGreymon and MetalGarurumon started to Joint Evolve with the help of the energy released from the OmegaMemory. And just like Keisuke and Mike expected, the result of this fusion was Omegamon. Alphamon had been expecting this as well and couldn't wait his chance to prove that he is better than Omegamon. The battle between Omegamon and Alphamon made protesters in the city to quit to watch the battle in awe. Alphamon started to launch his most powerful attacks on Omegamon, but Omegamon managed to endure them well. Now it was Alphamon's turn to be wounded by his own opponents. The battle started to be even, both sides landing powerful blows to each other. The result would depend on cunning rather than strength.

The betrayal
In the DigiQuartz, the other Partner Digimon manage to overpower Duftmon and LordKnightmon. When Millenniumon manages to finish his new crystal shell, he teleports every fighter, except those in New York into the location of the Quartz Globe. LordKnightmon starts to degenerate into Kotemon. That is when Keisuke receives files from Sven who helped him to remove the negative side effects of the synthetic evolution light. He uses it to pure Kotemon. But that is when Duftmon attacks Kotemon and mortally wounds him. This comes as a great shock to the Tamers and their Partner Digimon, the one who felt most shocked was Alphamon who sensed this in New York. Arkadimon and DarknessBagramon start to laugh, revealing that Duftmon was on the same side with them. Duftmon revealed that he was raised by Abaddomon who had raised him to become a spy since no one would be suspicious of a reincarnation of a Guardian Knight.

Dukemon, Ardhamon and Beowolfmon decide to deal with Duftmon while others focus on Arkadimon and breaking the crystal surrounding Millenniumon's body, now identified by the Digimon Analyzer as MoonMillenniumon. DarknessBagramon was about to get the full control of the Quartz Globe, but that is when Greymon and MailBirdramon from Blue Flare arrive. Mike and Nene knew that Christopher "Chris" White must have been aware of the latest events long enough to send reinforcements. Mike was still able to use the energy of the OmegaMemory and DigiFused Greymon and MailBirdramon with Shoutmon X5 to form Shoutmon X7. Shoutmon X7 lunged at DarknessBagramon and managed to slice off his skeletal arm. He then told DarknessBagramon to surrender.

The Great Gate of Darkness opens
In New York, Omegamon and Alphamon kept fighting and both of them started to be exhausted. But then, Kristin managed to catch Alphamon's attention to give Omegamon a chance for a surprise attack. Alphamon was left to lie in the ground while Yoko and Omegamon gave a speech to every human who had witnessed the battle. They said they had nothing to apologize from humanity because they had only done the best they can. They may have been failed to prevent the evil Digimon from getting everything they needed in order to initiate the Descending, but it was only because they lacked the knowledge and tools to do so…until now. But their chances to prevent the Descending were now ruined because the enemy had tricked the Tamers and the Guardian Knight Resistance to fight each other. Alphamon stood up and degenerated back into DORUmon. He acknowledged his defeat and dissolved the Resistance since Kotemon had been killed and Duftmon had betrayed him. Sam McCoy and members of the Network came to take him into custody while Yoko and Omegamon went to help shatter the crystal around MoonMillenniumon.

Garudamon, Zudomon, Rosemon, Dukemon, UlforceVeedramon, Ardhamon, Beowolfmon and Shoutmon X7 attacked together, but the crystal didn't break. Then, Omegamon finally arrived and managed to help the others to break the crystal. In the Dark Area, a voice of one of the Great Demon Lords said how the moment of freedom had come. But Millenniumon's essence had changed once again. The spirits of Chimairamon and Mugendramon appeared, being bound together by force fields. They had used the MoonMillenniumon's crystal as a protection to reach their most powerful form: ZedMillenniumon. ZedMillenniumon destroyed DarknessBagramon's body, but before helping him to fuse his spirit with the Quartz Globe. The distortions finally reached the North and South Poles, finishing the ritual for the Great Gate of Darkness. ZedMillenniumon sent the Tamers out of the DigiQuartz while Arkadimon and Duftmon escaped into the Digital Middle World. The Tamers had lost a battle once again, but Yoko believed that the war can still be won.

The Gathering
The families of the Tamers were evacuated from their homes and the world was waiting for an official statement from the Network. The Tamers, Spirit Warriors and Generals had been brought together in Denmark, with Chris White joining with fellow Generals. Gennai had left into Digimon Academy to meet with other Agents and Huckmon. Some of the Tamers question if they are powerful enough to defeat the Great Demon Lords now they will soon be free. Edenmon then started to speak through Eden's mouth once again, saying that they didn't have much time. The distortion that took the form a circle would expand around the planet. If the distortion would cover the planet fully, Earth would be doomed. Professor Christensen said that it was finally time to explain what the role of the Homeostasis in these events was. He and Edenmon proceeded to tell the full story behind everything.

Meanwhile, in Digimon Academy, something had infiltrated the place and was on its way to the quarantine. The room there Dark Gennai was kept locked was approached and the infiltrator gave a black sphere with power from each of the Great Demon Lords. This opened a portal into the Dark Area and after he stepped through it his ability to create illusions. He therefore used his newly restored powers to look like the real Gennai once again.

In Tokyo, Tadao Deguchi was still in coma, but then, suddenly, he opened his eyes. He looked around him and heard the speech of his younger sister from the television. He said how everything he had seen was not a dream at all. He even knew that there were things the Tamers were not aware of said how he needed to warn them and give them the final piece of the puzzle to prevent the Descending from happening.

Trivia

 * The subtitle of the film is inspired by the name of an undubbed Digimon Fusion episode "A Great Legendary Hero Gathering! The Digimon All-star Showdown!!".
 * The main focus of the film is to gather every main character of the previous live-action films to fight a common enemy.
 * There are however few expectations. Wade Goldblum and Terriermon do not appear in this film, while Chris White only appears in the final scenes.
 * The idea of making Eden Christensen a human avatar of Homeostasis is inspired by Homeostasis and Yggdrasill appearing as god-like beings in Digimon Adventure tri..
 * The Seed of Eden was partly inspired by Libra, the power that appears in Digimon Adventure tri. as Edenmon's role and nature were partly inspired by Meicoomon.
 * Alphamon's role was inspired by his role in both Digital Monster X-Evolution and Digimon Adventure tri.
 * Turning Kotemon into an opponent of the Tamers due to the death of his Tamer was inspired by LordKnightmon (Crusadermon in English dub) being a villain in Digimon Frontier.
 * Making Duftmon (Leopardmon in English dub) a villain was inspired by the incarnation of the character in Digimon Story: Cyber Sleuth where he was willing to destroy humans in order to eliminate the Eaters.
 * This film sets up two films:
 * It sets up its direct sequel Digimon: The Descending by ending the film with the release of the Great Demon Lords and the gathering of most of the protagonists of this film universe.
 * It sets up Digimon Origins #2: The Avatar when Professor Jørgen Christensen proceeds to tell the full story about how he met Eden and Edenmon and how he became aware of their role in restoring Yggdrasill's power.
 * Digimon: The Gathering includes several easter eggs.
 * The Tamers already know the identities of all Spirit Warriors because Kaiji and Kazuo Komiyama were already interrogated in Spirit Frontier Decem and Theo Robbins was interrogated in one of the ending scenes of Digimon 3.
 * Gennai starts to become an active ally of the Network after the events of Agumon.
 * The Tamers are aware of DarknessBagramon's plans due to the events of DigiFuse: The Omega Crusade''.
 * The former FBI Special Agent Nathanson from Terriermon makes a small appearance as a member of the Anti-Tamer Movement.
 * This film was designed to include less characters than in Digimon 3 in order to avoid the film to become too massive with characters.
 * This is the reason Nori Fujima, Alisha Jones, Vince Haldman, Jiro Ichida, Gemma Illiano, Jonah Sheridan, Osip Ivankov, Chris White and Nene Amano were decided to have smaller roles.
 * Hisayoshi Ozawa and Yu Amano were planned to appear in the film, but were removed from the plot.

Sequels
The fifth main film, Digimon: The Descending, was announced in November 23, 2016. It will be released as the fifteenth installment of the Digiversum, after Digimon Origins #2: The Avatar. All the main characters will face the Seven Great Demon Lords in a massive battle that determines the fate of the universe. The sixth main film, Digimon: New Information Age, will deal with the aftermath of their events. Two more sequels will be released after New Information Age.