While simultaneously setting up Batman v Phantom of the Opera.
But Wait a Minute
Bane is the anti-Batman. He's low-tech and merciless -- he's studied Batman and his gadgets, and his own pure, natural physical prowess is enough to counter all of Batman's training. But Batman has one secret weapon Bane wouldn't be familiar with: Earlier in the movie we see Batman getting back in shape, which includes him strapping on a high-tech leg brace that lets him kick bricks out of a goddamn wall.
"OH GOD! MY ANKLE!"
This ability would obviously give Batman a huge advantage in any fight -- particularly since it's a new trick and would catch Bane by surprise. Which is obviously why it is never, ever referenced again. What, did he forget to put the brace on before he left for the most important fight of his life? How? It's implied that he needs the brace to effectively do bat-things, like dropkick injustice into a dumpster full of vengeance. Bane and Batman's very first showdown should have ended with Batman cyborg-kicking Bane's genitals up into his cerebellum, then doing the Batusi for the last hour of the film's runtime.