Following the shooting deaths of at least 12 people at an Aurora, Colo., theater last night during a midnight showing of "The Dark Knight Rises," a trailer for the upcoming movie "Gangster Squad" that was offered with the film has been pulled, Warner Brothers has reportedly confirmed to NBC News.One scene from the trailer, which can be viewed at the 2:03 minute mark in the video above, features four men standing behind a movie screen in trenchcoats, walking towards the audience shooting at them with automatic weapons as mayhem erupts in the theater.