That's not to say that the plan always works (remember the Green Lantern game?), but Warner Bros. seems to have built up a few solid properties independent of tie-in movies. The next, then, is apparently a Hobbit game -- the article says there will be a game based on Peter Jackson's movie sometime next year. The company will also release a Lego Batman sequel, and some other casual online games featuring Warner characters.
Oh, and there's one more: an unannounced game based on a different DC superhero. Has anyone else been J'onzzing for a Martian Manhunter escapade?