A member of the Joblo forums (via Nolan Fans) uploaded this photo earlier today claiming to be the first set photo from The Dark Knight Rises. The image is of Arkham Asylum, Gotham's home of the criminally insane and the poster said;
my good mate who is working on set at cardington where its being shot sent me this.
From the sounds of things it's a left over set from Batman Begins but as filming on Batman 3 is soon to be returning to Cardington, there could certainly be something currently brewing that will see the set re-used. Is this where Joseph Gordon-Levitt's new take on The Joker will be housed? Aw come on guys, allow me to play devil's advocate a little!