15 Biggest Questions Still Left By 2018 Movies
5. How Does Scott Escape The Quantum Realm? - Ant-Man And The Wasp
It's long been expected that the Quantum Realm would be important to Avengers: Endgame, but Ant-Man and the Wasp confirmed it. The sequel may have largely told a much smaller scale story that was disconnected from most of the MCU, but the ending was directly linked to Infinity War: Hank, Janet, and Hope are snapped out of existence, leaving Scott Lang trapped in the Quantum Realm.
How he escapes - and just what he discovers while he's in there - looks like being crucial to the events of Avengers 4 and undoing Thanos' actions. The trailer shows Scott arriving at the Avengers HQ, although it's unclear when exactly that's happening. Still, it's clear that somehow he does find a way out of the Quantum Realm - most likely through a time vortex - but it's a question that will not only be answered in Endgame, but factor heavily into the overall plan of the heroes too.