In comic lore, Bane defeated Batman by breaking his back and Bane was eventually defeated by another character. I highly doubt they'll follow that same exact arc since it's too long and complicated for the movie, but we'll see. Bane is also one of the few enemies who discovered Batman's real identity. I find it unlikely that Batman dies, but I am sure Nolan will do it proper justice in that event and not use it just as a shock factor. Looking forward to it in any case.