Christopher Nolan was set to direct a big-screen adaptation of the British TV series The Prisoner back in 2006, and it was believed that he would start work on The Prisoner after finishing The Dark Knight. When Nolan chose to direct Inception after Dark Knight, it was assumed that The Prisoner would be next, except that Prisoner producer Barry Mendel told CineFOOLS that Nolan has dropped out:
Chris Nolan has dropped out of it, but we have a first draft by David and Janet Peoples who wrote Twelve Monkeys and David wrote Unforgiven and it's a good draft and we're working on the script right now.
Could Nolan be clearing his schedule for Batman 3? Fans are hoping so, though Nolan isn't saying a word. The director is hard at work on his extremely secret Inception, for which so little is known that some Paris-set photos and discovering the characters' names are the only revealing items outside of a curious synopsis that describes the movie as "a contemporary sci-fi actioner set within the architecture of the mind."
More will hopefully be revealed about Inception when the trailer plays before Inglourious Basterds, but Nolan's involvement in Batman 3 will remain a secret.