Backstage, an actor'ss resource website, has a production listing that says The Dark Knight Rises will begin filming in New Orleans this April.
The production listing from
Backtage reads:
The Dark Knight Rises (Batman 3) (Action/Comic Book) The third installment in director Christopher Nolan's Batman reboot. Christian Bale, Morgan Freeman, and Michael Caine star. Casting: John Papsidera, Automatic Sweat, 5243 W. Washington Blvd., L.A., CA 90016. Shoots in April in New Orleans.
The Dark Knight Rises is scheduled to come out July 20, 2012.