Marvel has a habit of putting differences in their trailers compared to the movies (E.g. Not showing Thor missing an eye in the Infinity War trailer).
Were there any for Avengers: Endgame and if so, what were they?
I just saw it fresh in the theatre, so I hope my memory won't fail me. I'll try to put the major ones in spoiler tags and mentioned when I'm not sure. All of these are from trailers and they don't happen in the movie.
Didn't happen AFAIK
Shown multiple times. Multiple people edited out. I won't mention it in following trailers again.
Can't remember this scene, but not sure.
This scene is in multiple trailers. Didn't happen and I won't mention it in the following trailers.
At this point, he had an injury on his arm which was edited out.
This is the one with scenes from previous films with highlighted red colour. It also has plenty of lines, which were not said in the film.
It seems like a thousand years ago. I fought my way out of that cave. Became Iron Man, realized I loved you
The world has changed. None of us can go back, what we can do is our best and sometimes the best we can do is to start over.
I saw all these people die
This is also a recurring scene.
I think in the movie he ran with Infinity Gauntlet in hand.
Only Captain America and Black Widow say it out loud in the movie. Also a recurring one.
He doesn't smile afterwards. You can check the full scene in another TV Spot
Yeah because he killed all our friends?
At this point, Captain shield was broken.
There were lots of differences between the trailer and the movie. Some of which are as follows.
Warning: it has spoilers.
In the 2nd trailer, we see that Avengers marching wearing quantum suits. This scene was missing in the movie. They don't really march.
Hulk's appearance was kept secret this time. We see only Bruce Banner not Hulk. In Infinity War trailer, we saw Hulk on Wakanda, but not in the movie. This time they didn't show Hulk, but Hulk is in the movie.
Captain America's shield is shown intact in the trailer, but it is broken during that sequence.
We see Hawkeye running from explosion holding infinity gauntlet, but this particular scene doesn't appear in the movie.
We see Natasha AKA Black Widow in the trailer target practicing and punching bags. However, these scenes didn't make it into the movie.
When Tony arrives on earth, Avengers were waiting for him along with Pepper Potts, but the trailer doesn't show her.