Introduced in Ant-Man (2015), Quantum Realm is `a place where space and time become meaningless`.
Both films take place before the events of Avengers: Infinity War and are likely to be closely linked to Avengers 4.
According to fan predictions from the trailers of Ant-Man and The Wasp, Hank Pym (Michael Douglas) opened the Quantum Realm to save Janet Van Dyne (Michelle Pfeiffer), but at the same time released the evil Ghost (
Besides, a part of fans believes that Carol Danvers (Brie Larson) was absent from Earth for 20 years because of the Quantum Realm.
Marvel Studios has made no secret that Tony Stark (Robert Downey Jr.) will play an extremely important role in Avengers 4 as he is always haunted by Thanos after the war in New York 8 years earlier.
The clearest proof is that Doctor Strange (Benedict Cumberbatch) accepted to hand over the Time Stone in exchange for Iron Man’s life, saying that was `the only way to win`.
The Russo brothers once revealed that B.A.R.F.’s memory regeneration technology.
However, with the help of genius Shuri (Letitia Wright), that idea can completely come true.
With the Time Stone in Thanos’s hands and Doctor Strange having turned to dust, this theory is actually unlikely.
Nebula (Karen Gillan) can sneak in and steal the stone when the Black Order has been wiped out, just like what she did in the original comics.
In addition to Stephen Strange, Wong (Benedict Wong) is also a disciple of the Ancient One (Tilda Swinton), and is capable of using the Time Stone.
Accordingly, Dormammu’s Dark Dimension has absolutely no concept of time.
Almost all the superheroes who disappeared in Avengers: Infinity War are confirmed to return in the next films.
Accordingly, time travel is the simplest way to `revive` a group of familiar characters.
Besides, confronting Thanos at the present time is impossible when he possesses the `full set` of Infinity Gauntlets.
Before the events of Avengers: Infinity War, the Aether was still in the hands of The Collector (Benicio del Toro), the Teseract was in Asgard, the Mind Stone was released by S.H.I.E.L.D.
In general, everything is just at the hypothetical level.