Re: "The Dark Knight Rises" Review and Discussion Thread (spoilers)
Tim was sure that Bruce was still alive and was right. But Bruce did come back, and Dick returned to being Nightwing. There was an alternate future issue that had Damian as Batman after Bruce's death, and apprently there are also some set even later with Terry McGinnis. But in current continuity, Bruce Wayne is Batman, and the others have really only ever filled in during his absence
"In blackest day, in brightest night, beware your fears made into light. Let those who try to stop what's right, burn like my power: Sinestro's might!"