Wait till Storm comes a long and breaks the game in two (Psylocke, Rogue, or Spiral wouldn't hurt). She will more then make up for the lack of girls on the marvel side right now. But right now Iron man is looking like a good contender for top tier, and without his infinites to boot!
Doom is kinda like mvc2 doom, and they made roman candle and the beam better, pop gun seems to be a special move now, and it looks like they nerfed molecular shield. Hopefully his sweep won't be unblockable for stupid reasons (hits on both sides so it auto crosses up no matter which way you block. Ya, you heard me right.)
But this game is still in its infancy, so i'll leave it alone till its comes out. Until then... HYPE THIS SHIT MOTHER FUCKERS!!!