'The Dark Knight Rises' -- Warner Bros. Axing Gun Imagery from Movie Trailer

The studio behind "The Dark Knight Rises" is removing all images and references to guns from all "Batman" movie trailers ... TMZ has learned.

Sources tell TMZ ... the honchos at Warner Bros. gave the order just a few hours after the shooting in Colorado this morning.

We're told the studio is hoping to replace the current made for TV trailers with the gun-free version as soon as possible.