Warbler said:

DominicCobb said:

What they DO show, is that Bruce Wayne has made it very clear that it doesn't matter who's behind the mask. They also show that Gordon was given a new BATSIGNAL. And that Blake was given the BATCAVE, and when he goes in, BATS swirl around him just like they did to Bruce in Batman Begins. If you paid attention, it is very, very obvious that he becomes Batman.

except they never should him putting on the Bat suit. So for all we know, he becomes Nightwing or maybe Red Robin or something else.

Yes, for all we know he could of, but the clear implication here is that he becomes Batman.