The thing that bugged me about the ending is how Batman just walked up to Bane. Since Bane never believe Batman is effective and sees right through his "theatrics"... I think Batman coming in this way would be nice to show how wrong Bane is. Also Bruce Wayne wants Batman to be a symbol, so this approach would also help re-enforce that goal.
The other reason this might work better imo is that most of the Gotham cops have been on the run or living underground. I would think Bane's men have (at least) some training with League of Shadows, better rested, and armed with assault rifles. The cops really have no chance in this fight. Batman would feel more of a hero if he helps out in this way. There's also nice contrast from the top of the film where Batman is a fugitive and now leading the cops.
Well, that's my pitch. Hope you like it. :)