Avengers: Endgame - 12 Plot Hints From The New Trailer
7. Scott Lang Realizing The Extent Of The Decimation
The last audiences saw of Scott Lang, he was getting accidentally left in the Quantum Realm after his teammates who were supposed to pull him out all accidentally turned to ash, as you do.
Now, he's clearly gotten out of the Quantum Realm in one way or another but the most interesting shot he gets in this trailer is of him seemingly realizing that half the world is gone. This is made all the more emotionally impactful by the fact that he looks to be standing in front of his ex-wife and daughter's suburban home.
Scott is certainly no stranger to getting himself out of the Quantum Realm, as he's done it a few times before. So expect to see him find his own way out, only to be welcomed back to a world very different from the one he left. It looks as though he will go to see his family, only to discover that they are all gone, as teased by the post-credits scene of Ant-Man and the Wasp.
From here, it's likely that he'll go and attempt to find the rest of the Avengers at HQ, in hopes of helping them undo the damage and get his family back.