Using the TvC engine is not a bad thing...it's just that I thought MvC was a different animal and would use high-rez sprites given its storied history. I can use Ryu's beam hadoken in TvC already, so this has to have more variety than that.
To make this exciting, they're really going to have to break out some interesting roster choices. Capcom needs characters like DMC's Dante, Ghosts 'n Goblins' Sir Arthur, Megaman X's Sigma and/or Vile, and some male Darkstalkers people will use like Demitri, Donavan, and/or Talbain. Marvel, I don't care about too much, but they should at least try Silver Surfer and Galactus.