This is just a prediction, my friend. A reporter from Detroit Free Press told that Nolan is calling from Hong Kong but refuses to say anything about it. It's "top-secret business" the director said. But, the implication is that Nolan is scouting Hong Kong as one of the film's shooting locations, though Michael Caine says he hasn't a clue what the story is about. "After all, I'm just the hired help," says Caine. "I am born to serve."