Avengers: Endgame's Main Plot Trick Is Badly Explained--Here's What's Going On

Warning: This post is full of spoilers for Avengers: Endgame. If you haven't seen the movie, you're probably going to want to stop reading before it's too late. How about reading our spoiler-free review instead?So the theories were right: Avengers: Endgame is a time travel story, in which the superheroes work to undo Thanos's devastating snap by revisiting a bunch of the events from their past. The plan is to acquire the Infinity Stones from times before Thanos collected them all, then use them