[@Acid Hippie] As tobiax said, Justimon was a simple product of Ryo biomerging with his Monodramon. That and the Millenniummon thing. I haven't really thought far enough ahead to know for sure how we'll be obtaining Mega forms, but I'm willing to ignore the Ryo thing if you prefer Justimon (since I'm pretty sure Cyberdramon is capable of becomming Justimon on his own in some of the games). Otherwise, yes, Beelzemon does lend itself better to an evil-ish tree like Cyberdramon, so I suppose I'll leave it up to you. I'd rather avoid using too many alternate modes (like Blast Mode) since not every Mega can utilize them. I prefer if this particular cast of characters remain balanced as opposed to dumping all the power ups on just one or two of the characters like the animes tend to do.