Well I wouldn't be surprised if they chose a character from a ge comming out this year seeing as they are picking current games as the current dlc. Well star hawk at least idk when Kats game came out..
Grvaity Rush came out in Ferbruary 2012. In Japan.
Oh so it's a current game also then! Well guys lets look at the current games this year theatre ps3 exclusive and try to guess who might be the next dlc!
Persona 4 Golden is a current Vita game and Persona 4 Arena is a current PS3 game.
Seriously though, theres quite a few games but theres only a small handful worth adding into the game.