After Bats had his back snapped like a twig by Bane and spent all the time in that prison...hole...place things kinda slowed to a crawl. It was all Bane and his kooky "i r teh leeg of shadows, i'ma make Gotham go kablooey" plot and its effects were just failtastic. Ditto for Talia al Ghul. Very dissatisfying plot twist.
Bats and Catwoman retiring together instead of Bats going kablooey was a failure as well, I thought. At least defeating Bane by blasting him in the chest with a cannon was appropriate. Probably one of the things that was done best: Bats genuinely being incapable of defeating Bane by his usual methods.