As it turns out, the young Peter Parker actor revealed an Avengers: Endgame spoiler while doing press for Infinity War last year.
The surviving Avengers have been shown in new suits for the Avengers: Endgame promotional material and many believe that these are the Quantum Realm suits.
The Quantum Realm has been talked about frequently in association with Avengers: Endgame.
It’s important to note that the Quantum Realm was not talked about in Infinity War.