You only need to watch one of the trailers to see that a lot ended up not making it into the theatrical cut, and now thanks to a Q & A with some of the concept artists and costume designers, we now some other tidbits that didn’t make it as well.
Sometimes the cuts can be detrimental like with Suicide Squad, or you can get something like Rogue One: a film that was less obviously restructured and doesn’t impact the quality.
It’s not unusual for a blockbuster film to go through several different iterations of itself before it finally settles on the version that will make it up on the big screen.