Megaman X. Everyone from the Fantastic Four (i wonder why Invisible Woman can't be her own ability card in Heroes and Heralds) Mystique from X-Men.
Megaman X Nero Cyclops Gambit If at least some of those four make it into a new MvC game, I'd be happy.
X is never gonna make it guys, doesn't matter anyway, game can still be good without Megaman. Anyway, I seriously wish they would add Chuck Greene from DR2 or Venom or Carnage, would be nice.
Guys, give it up. He's not coming back. He's too damn gimmicky; nobody played him in MvC2, with reason, and I seriously don't see a way for the sorts of changes to be made that would render him viable. You know who'd be a fun one, though? Sigma. A mid-heavy character with slow, powerful hits, but who could actually get across the screen decently. No projectiles, but fair-to-good range on his normals. Although they could give him some laser weapons. Yeah... He'd play like something between Vergil and Nemesis. Yeah, I can see it now...
well, i never thought Megaman was bad in MvC2, i always kicked a$$ with him! but it doesn't really matter to me whether a character is actually good or not, it's about having a favorite character make an appearance. i mean, look at Phoenix Wright. i find him fun to use but i probably wouldn't play him if i was dead serious on winning. i'm honestly surprised that Phoenix Wright made it as a fighting character. as for Sigma, i agree that Sigma would make an excellent addition! i doubt that Capcom would have any trouble coming up with moves for him.
Marvel: Red Skull Venom or Carnage Daredevil Blade The Punisher Capcom: M. Bison (OF COURSE!) Regina (from Dino Crisis. Which is basicly Resident Evil WITH DINOSAURS!) Dan Smith (from killer7) A Monster Hunter (from well... Monster Hunter) Ryu (from Breath of Fire)