Lets hope not anytime soon.These type of movies need devolping like whos gonna play the two most popular superheroes? Batman and Superman I dont think Bale will be batman in a JLA movie no way
DC is planning to continue Nolan's Batman franchise and reboot the Superman franchise while releasing single movies for characters such as Flash, Green Lantern, Wonder Woman, etc. After they're all been introduced, Nolan's Batman franchise will have a crossover with the Reboot Superman franchise. And after the crossover is completed, they will be doing a JLA movie with all the heroes (or almost all) that have been introduced.
I wouldnt mind seeing a Batman/Superman team-up pre-JLA, but I don't see Nolanverse Batman teaming up with anyone. Heck, I don't even see Superman or other heroes existing Nolans Batman universe. It will be interesting to see how they go about setting everything up.
__________________ The dark Side is in me. What about you?
In a recent interview, Nolan was asked if he will crossover with the Superman franchise. He said he might but not yet. And now, he wants to keep the realism in his franchise even since Superman and his enemies will be all aliens.