Because it has a shooting in a movie theater. While I understand them pulling the trailer with that scene in it, I really hate that they are re-shooting it for the full movie. I understand that the events that happened in real life are tragic, but come on. Sometimes it seems that people are too sensitive or overly sensitive about things. If it effected you so much that a scene like that would offend you, don't go see it. Just because something is offensive, doesn't mean it needs to be changed. The scene look amazing in the trailer and was one of the things that got me interested, and now that they are re-shooting it, I feel a bit annoyed. I'm not sure how much they are going to change, but hopefully it's not a lot.