So just how did Scott Lang escape the Quantum Realm, when Janet Van Dyne could not? So far, there are two possible clues. The first is that, when Scott entered the Quantum Realm in the post-credits scene, Janet gave him an important piece of advice; "Don't get sucked into a time vortex," she told him. "We won't be able to save you." In science fiction, a "time vortex" is usually an elaboration of Einstein's theories, and is often used to travel through time and space. A scientist like Janet would know better than to jump into a time vortex in order to escape the Quantum Realm; she'd be well aware that she could wind up anywhere, or any-when, potentially on any plane of existence. But Scott Lang isn't quite so smart, he's a lot clumsier, and he's willing to take crazy chances. He could conceivably either stumble into a time vortex, or actually choose to dive into one. It's worth remembering that Scott is wearing the Ant-Man suit, which means that if he winds up in the wrong place in time or space, he could simply shut down the regulators and shrink back down until he enters the Quantum Realm to try again with another time vortex.
There's a second important clue, though; in the Avengers: Endgame trailer, he drives up to the Avengers compound in a very distinctive van. It's Hank Pym's, and it contains a portable Quantum Tunnel. Now, it's true that the post-credits scene of Ant-Man & the Wasp strongly implied that the Quantum Tunnel could only be operated from the outside, but it's not difficult to imagine the possibility that Pym had built a failsafe of some kind, in case something went catastrophically wrong. So it's quite possible that van could still be Ant-Man's way out of the Quantum Realm.
At this stage, there's little concrete evidence to support either possibility. At the same time, though, the former is the most interesting in that there's an abundance of evidence supporting the notion that Avengers: Endgame involves time travel.
• Thor •
[🇺🇲] - I was reassigning the movie (and I haven't finished yet 😪), so, I just need to make that scene! 💚
[🇧🇷] - Eu estava reassistindo o filme (e ainda não terminei), então, eu precisava fazer essa cena! 💚
Q | Do you like the Thor's movies (the trilogy)? | Você gosta dos filmes do Thor (a triologia)?
A | I don't watch so much as I watch the Iron Man's movies, but, I love 💚
~ Jas 💕