Capcom actually did it. Phoenix Wright is in Ultimate Marvel vs. Capcom 3, and somehow Capcom managed to build an arsenal of attacks based on Phoenix's strengths: investigation, gathering and presenting evidence, and ... getting out of Maya Fey's way. He even has a super attack in which he presents decisive evidence in a murder case against his opponent.
If you're at New York Comic-Con, you'll be able to get material for your own testimony about this game by playing the new build featuring Phoenix.
The new media also features Marvel's Nova, and a new background, with a poster in which heroes present for MvC2 but not MvC3 are listed as either "slain" or "apprehended." That's ice cold, Capcom. And not just in Iceman's case.