Rejoice! The Jill Valentine in Marvel vs. Capcom 3 is the overclocked-and-brainwashed, eat-your-heart-out-Keanu-Reeves Jill from Resident Evil 5! It looks like Capcom managed to retain all her style from the game in MvC3, too.
Marvel vs. Capcom 3 also has tentacles. Shuma Gorath has those covered. Both Shuma Gorath and Jill will be available as downloadable content after Marvel vs. Capcom 3 releases. We’ll have more details on this front as Capcom reveal them, but for now, we do know that buying the special edition of the game will grant you a free download voucher for both characters.