https://www.cnet.com/news/every-avengers-endgame-plotline-and-clue-we-can-find-so-far/

Almost every ad features Thor calling for Stormbreaker (not Mjolnir) and nearly giving an unfazed Captain Marvel a close shave. There's Captain America letting a tear drip down. There's a shot of a variety of Avengers striding forth in white suits a la Star Wars Stormtroopers. But what's really going on here? If you want to go into the three-hour blockbuster unspoiled, stop reading now, because it's time to pick apart the clues Marvel's delivered.

Be warned, though: In the past, Marvel has thrown footage into trailers that didn't appear in the movies, and directors Joe and Anthony Russo have teased about including fake scenes.