Final Fantasy Versus XIII on Xbox
Square Enix is considering releasing the Final Fantasy XIII side story for Xbox 360, negating the game's status as a PlayStation 3-exclusive.
Square Enix has not publicly discussed Final Fantasy Versus XIII for some time now, deflecting any and all questions in the lead up to Final Fantasy XIII. Project lead Tetsuya Nomura has promised a formal unveiling of the game later this year.
A multi-platform release would make sense, though until Square Enix makes an announcement it's nothing more than speculation.