Personally, I think it should be someone like Rocksteady. If they took the engine they built for the Batman Arkham trilogy of games, it could be incredible. Just gotta take out some of the more frustrating elements of the Arkham series (too many Riddler trophies... the Batmobile tank battles were frustrating enough that many people quit playing once they got to the Cloudburst sequence... I know I nearly did).
What do you think? Would you play a Rocksteady developed Matrix game? The property belongs to Warner Bros, just like Batman, so it could happen!