Submitted: Jul 17, 2008 - Most superhero movies are content to pit good against evil. What sets Christopher Nolan's The Dark Knight apart from the crowd - and earns its "dark" label, thematically speaking - is that the film makes little distinction between good and evil. For starters, Nolan (and his screenwriting partner/brother Jonathan) asks, what is a superhero but a vigilante who breaks the law by taking it into his…