Captain Craig wrote:
Batman vanished for awhile and came back. Just cause this film ends with him gone again doesn't mean he can't come back. Especially if Robin really gets things up and going in Gotham as the end seems to demonstrate he just might. Nolan set up Robin, perhaps as producer of a 4th film he could help craft another return of the Bat with another installment.
Blake wasn't set up to keep things going as "Robin". Without doubt or question, he becomes Batman. Bruce isn't coming back. Blake is the Dark Knight now. He even has his own "Alfred" in the priest who runs the orphans home upstairs. Gordon and Fox are still around as well, so Blake certainly won't be without connections and resources.