Yes, I think it's likely. They may be waiting to see how MvC2 PSN/XBL sells before fully greenlighting the project, though.
It'll probably be based on a modified TvC engine, but at 360/PS3 graphic standards. The roster will likely not carry over from MvC2, likely it'll be 20-30 characters with several new Marvel characters (deadpool, ghost rider, daredevil, etc seem like some solid choices) and some more recently relevent capcom characters like Dante or Chris Redfield. This is just wild guessing on my part, I have no idea what they'l actually do.