Wow. That’s one heck of a climax. In Avengers: Infinity War, Thanos won. He snapped and half of the universe died–let’s ignore the logistics of that. In Endgame, there’s a chance–a very small chance–that they can fix it all. All they need is a little – Tony Stark: [discussing the “Time Heist”] I believe the most likely outcome will be our collective demise. Scott Lang: Not if we strictly follow the rules of time travel.