Movie Studios Can Now be Sued for Deceptive Trailers - IGN
A district judge ruled on Tuesday that movie studios can be sued under false advertising laws if they release deceptive movie trailers.
“Universal is correct that trailers involve some creativity and editorial discretion, but this creativity does not outweigh the commercial nature of a trailer,” Wilson wrote. “At its core, a trailer is an advertisement designed to sell a movie by providing consumers with a preview of the movie.”
This opens up a whole can of worms, especially for teaser type trailers
For example the Rogue One trailer I remember scene with Jyn facing down a Tie Fighter and watching for that, but it never made it into the movie
Same with some scenes from The Force Awakens trailer
Countless other movies also where there are shots specifically created for the trailers