Just read this article about the Comic Con Marvel panel at http://www.newsarama.com/film/080725-your-marvel-universe.html.
The second to last paragraph talks about a new Marvel vs Capcom game.
From the article:
Possibility of another Marvel vs. Capcom game (a question that excited the audience)? “Would it be possible one day? Yes. And maybe sooner than you think,” teased Feige.
If this has already been posted please delete.