“The Dark Knight Rises” is on track to earn $160 million after a shooting that left 12 dead and 58 wounded at a midnight screening of the Batman sequel in Colorado. Hollywood studios joined “Dark Knight Rises” distributor Warner Bros. in publicly withholding their box-office numbers for the weekend. Box-office tracking service Rentrak also did not report figures this weekend. An opening of $160 million would give the 2-D “Dark Knight Rises” the third-highest opening ever after the 3-D films “The Avengers” with $207.4 million and “Harry Potter and the Deathly Hallows, Part 2” with $169.2 million