Thread:CirUmeUela/@comment-27496405-20180307074410/@comment-4596141-20180428102732

Going to go see it again Monday, is there any other timeline questions we need answering I can look for details on?

also I'll share my theory with everyone here, SPOILERS OBVIOUSLY BELOW

Doctor Strange used the TIme Stone to change something about the Battle of New York that ensures the one timeline where they win against Thanos occurs. This is the cause of all the Heroes who formed after New York disappearing, and not because of the Snap. This is why Strange tells Tony "It was the only way". Something about this change will give them some sort of advantage in a second battle with Thanos to take the Infinity Gauntlet and reverse Thanos' Snap. I believe Tony will use the BARF system to replicate the battle and try to understand what changed.