“The Dark Knight” hit theaters like a bat outta hell and sold $18.5 million at midnight shows, toppling the $16.9 million record held by “Revenge of the Sith,” which went on to gross $50 million on its opening day. The question is whether Batman can sell enough tickets today (Friday) to upset the opening day record of $59.8M set last year by “Spider-Man 3,” which also holds the belt for a regular three-day weekend, $151M. Should be an interesting weekend.