NEW The Mummy: Tomb of the Dragon Emperor (Universal) / 3,759 Swing Vote (Buena Vista) / 2,213 EXPANDING Mamma Mia! (Universal) / 3,060 (+70) / 3 DECLINING The Dark Knight (Warner Bros.) / 4,266 (-100) / 3 Hancock (Sony / Columbia) / 2,782 (-527) / 5 Wall-E (Buena Vista) / 2,555 (-489) / 6