Well I won't be playing this unless they port it to Wii or PC, but it does look dang awesome. Seeing Chris in it is definitely epic. I never played the second one but I really hope they put Megaman or X in this one!
MvC2 had the Classic Megaman and Jill. The creators mentioned that they are trying to input characters that fans have been demanding for, while keeping it as balanced as possible.
Maybe they'll add a Classic Megaman/X combo, or maybe Megaman Zero. Everyone start dreaming from now till 2011 XD.