Former Capcom developer Keiji Inafune accidentally revealed at Game Developers Conference earlier today that he's working on a PlayStation Vita game. Sony confirmed that he's working on the platform via a video that was released as part of the PlayStation Vita Game Heaven video series today.
In the video, Inafune describes his new game as an "Inafune-like" game. He also describes it as an "amazing" game, but would not share specifics.
Based off Inafune's comments, it seems that Sony Computer Entertainment will be publishing the game.
View Inafune's message here.