Possible, but not likely. Wouldn't fit in with Nolan's attempt at a *more* realistic comic book hero film, esp. if Batman is walking again by the end of the film.
This film is going to have to be about redemption, Batman winning the people back, proving that he is different to the Joker and what Harvey Dent became. And Selina Kyle, whatever she becomes, is going to take the journey with him.