Warner Bros has set Batman 3 for release on July 20, 2012, according to an internal email just sent by distribution chief Dan Fellman. There is no official start of production date at this point because Chris Nolan just completed Inception, the film that opens July 16. The film is expected to be done in 3D, as studio chief Alan Horn told theater owners at ShoWest that all Warner Bros tent poles will be done that way. Of course, Nolan will make the final decision, he’s the most dominant director presence the studio has. Nolan’s brother and oft-collaborator Jonathan Nolan has been working on the script, based on a story hatched by the writer and David Goyer. Goyer simultaneously is writing the next Superman installment, which is being godfathered by Nolan based on an idea he and Goyer hatched together. No word on when that gets into production.