Dark Knight said:I have been thinking about this on and off for the past month actually. Good question.
Anyhow....I have two ideas.
1. Almost similiar to the way the first one ended. We have Gordon and Bats talking on the roof top about what they could have done to save people who were killed by Joker. Possibly even see what they could have done to help Dent. The same music is used in the end that was used in Begins.....then Gordon gets a call from the hospital about how Dent has escaped from hospitala and how he killed a doctor. Gordon tells Batman to use any means necessary within the law to find him.
2. Bruce is at his parents gravesite near the manor reflecting on things his parents taught him....the sun has just set.....Alfred and Dr. Leslie Thompkins start to walk toward Bruce and the gravesite and stand behind him whhile Bruce stares at the graves and leaves two roses. The music from the end of Begins is playing...and Alfred tells Bruce the news stated D.A. Harvey Dent as escaped from the hospital and that a Doctor is dead. Bruce says "my god" and the camera pans out from showing Bruce staring at the gravesite with Alfred and Leslie looking on behind him.....and then while the music plays the camera starts going up toward the cloudy night sky......the music ends and at the sametime the Bat signal is highlighted in the sky. Movie ends....credits start.....
I think those two are very good finale's. I especially like the ending to the 2nd option with the Bat Signal. It may seem cleche but it's still sick seeing that.