Scott, meanwhile, is stuck in the Quantum Realm. This sequel to 2015's Ant-Man reunites audiences with titular hero Scott Lang (Paul Rudd), still working alongside Hope van Dyne, a.k.a. the Wasp (Evangeline Lilly), and her dad Hank Pym (Michael Douglas). This is probably significant for Avengers 4.
It's worth noting that with this new, smaller bridge, Scott isn't using the submarine like vehicle that Hank used when he went to pull Jan out.
"Jim Starlin said, he found out that they're actually going to put it into a special edition Avengers: Infinity War", states Schnepp: "The way [Starlin] was saying it, they weren't going to be seen as deleted scenes, they were actually going to be re-integrated into the film to make a special edition that had all those scenes re-incoporated". It's not a spoiler to reveal that Ant-Man is not in that film. Don't expect this one to give you any information about Thanos or even how Scott will escape the Quantum realm without Hope and her parents to help him. The ant who'd subbed in for Scott's daily routine is not only home, he's having the time of his life banging on Scott's electric drum kit.
There's basically an endless list of possibilities revolving around the Quantum Realm. We learned in this movie that quantum particles can literally affect the nature of reality and can cause (or, significantly, reverse) the phasing of matter between parallel universes. Marvel doesn't just toss away key lines like that for nothing; studio head Kevin Feige meticulously maps out every facet of this shared cinematic universe, leading us to believe that these time vortexes will play a role later on.
Granted, it's pretty unlikely that Scott is going to stay trapped in the Quantum Realm for as long as Jan was, but we shouldn't rule out the possibility that he's going to come out the other side displaying similar energy manipulation abilities, at least temporarily.
"The Quantum Realm is a really intriguing environment and character in the MCU".
As they say at the House of Evil, "that's bad". Or maybe he even learns about Thanos and attempts to warn the Avengers of his presence early on in the MCU's running timeline? The fallen heroes were reduced to dust in Infinity War and not shown to be explicitly dead.
Avengers 4 will arrive in May, 2019.