One of the reasons why I absolutely love Christopher Nolan, he is absolutely unlike many other film makers easily swayed by the dollar sign. Every movie he made so far were pretty much "stand-alone" kind of movies, the kind that doesn't really sets itself up for a sequel.
However, some might argue that the last Batman movie did end with quite a bit of a cliffhanger. Although I personally think it was simply as a mean to complete the character arc for Bruce Wayne/Batman. Still, it did leave everyone with an anticipation for more, and so Christopher Nolan confirmed that he will make one final Batman movie entitled, The Dark Knight Rises.
1. Two-face and The Joker won't be returning, that much is confirmed.
2. We'll be having Bane, and he will be played by Tom Hardy, best known as Mr. Eames in one of the best movies ever made, Inception . You might remember Bane in Joel Schumacher's Batman & Robin  a.k.a The Worst Batman Movie Ever Made They're Gonna Have to Reboot the Franchise to Save It. Bane was the one wearing that gimp mask. Watch the interview below for a clearer picture.
What is interesting is how the character Bane is going to work, considering that he is rather cartoonish to fit in Christopher Nolan's bleak, gritty and closer-to-reality interpretation of the Batman universe. Sure, Tom Hardy can beef up if he needs to, like he did for Bronson ...
... but still Bane is like, professional wrestler huge, the kind that eat steroids for breakfast. But still I say, trust Christopher Nolan.
3. Selina Kyle a.k.a Catwoman will also be making an appearance, and she will be played by Anne Hathaway. She has proven time and time again that she looks great in black...
... and even if she can't top Michelle Pfeiffer's portrayal of the character, I doubt that she'll be worse than Halle Berry in Catwoman .
I'm afraid little else is confirmed at this point, but I'm not complaining. Christopher Nolan is known to play things very close to the chest, and let's just trust him to continually make one masterpiece after another.