User blog comment:Zeref Fullbuster/Tri Megas/@comment-5600444-20160117114037/@comment-5600444-20160117114334

But about the real question of this thread: who knows? And why you mention Wormmon too? Imperialdramon is a Mega form to both him and Veemon, judging by the different colors in the trailer for the second film, Alphamon (and most likely Huckmon too) must have brainwashed him to join them, meaning that the film series might have something to do with the Royal Knights.