So Anne Hathaway is Selina Kyle and possibly Catwoman. Tom Hardy is Bane. The main question now is will the villains from the previous movies return? That would make things a little crowded and I believe after Spider-man 3, studios will try and avoid over crowding a movie with characters. The real question is will the Joker or Two Face show up? Well Heath Ledger passed away and in no way would they recast him to play a small part in the third film. Problem is that Nolan’s original idea for the third film involved the Joker. His character and Ledger’s performance made The Dark Knight a huge box office monster. Still his return as a character is doubtful, he’ll probably be mentioned by someone in the film but that’s about it.
Two Face is another story. Sure we in a way see Dent die. Batman tackles him off a roof and fails to catch him. Still though Dent could still be alive. His funeral at the end of The Dark Knight could be a fake. Maybe to help Gotham not fall apart Batman takes the blame and is chased by the police. While Dent is placed in prison or Akrham Asylum for his own safety. This could work and be great for nerds to have Dent back. Another characters that could return is possibly another Ras Al Guhl or Scarecrow from Batman Begins. Either way expect these types of discussions to continue on about villains until the movie comes out in theaters.