The bigger lie in that trailer was that Thor confronted Hela somewhere other than a grassy field, with walls around her when she crushes his hammer.

I also remember Iron Man 2, when he's going to fly into the convention, he asks Pepper for a kiss, she kisses his mask and tosses out of the plane, which she didn't in the movie.

In non Marvel films, Star Wars Rogue One had a lot of stuff in the trailers that didn't make the cut, most notably Jyn confronting a TIE fighter, and that execrable line with "This is a rebellion...I rebel".