Director Christopher Nolan and his wife, producer Emma Thomas, arrive at a Warner Bros. Pictures presentation to promote their upcoming movie, 'The Dark Knight Rises' at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, April 24, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Director Christopher Nolan and his wife, producer Emma Thomas, arrive at a Warner Bros. Pictures presentation to promote their upcoming movie, 'The Dark Knight Rises' at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, April 24, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Director Christopher Nolan and his wife, producer Emma Thomas, arrive at a Warner Bros. Pictures presentation to promote their upcoming movie, 'The Dark Knight Rises' at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, April 24, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Director Christopher Nolan and his wife, producer Emma Thomas, arrive at a Warner Bros. Pictures presentation to promote their upcoming movie, 'The Dark Knight Rises' at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, April 24, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Director Sam Raimi speaks at a Walt Disney Studios Motion Pictures presentation to promote his upcoming film, 'Oz: The Great and Powerful' at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, April 24, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Director Sam Raimi speaks at a Walt Disney Studios Motion Pictures presentation to promote his upcoming film, 'Oz: The Great and Powerful' at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, April 24, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Director Adam Shankman arrives at a Warner Bros. Pictures presentation to promote his upcoming movie, 'Rock of Ages' at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, April 24, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)

Director Adam Shankman arrives at a Warner Bros. Pictures presentation to promote his upcoming movie, 'Rock of Ages' at The Colosseum at Caesars Palace during CinemaCon, the official convention of the National Association of Theatre Owners, April 24, 2012 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images)