UPDATE: Joseph Gordon-Levitt's role in the film has been revealed to be Alberto Falcone, you can get more on the casting here.
The trade also says Juno Temple (Year One) is being eyed for a supporting role as "a street-smart Gotham girl."
The Dark Knight Rises is slated to hit theaters on July 20, 2012 with Christian Bale returning along with Michael Caine, Gary Oldman and Morgan Freeman. Tom Hardy will play the film's lead villain Bane and Anne Hathaway will play Selina Kyle. Shooting is expected to take place in London and Los Angeles in May.