Ever since Guardians of the Galaxy Vol. 2 ended with a tease of the cosmic Marvel hero Adam Warlock, fans have been waiting for him to show up somewhere in the Marvel Cinematic Universe.
In the comics, Adam Warlock emerged from similar cocoons in Marvel Comics.
Instead, it looks like he will make his debut back in Guardians, in Guardians of the Galaxy Vol. 3.
He was a no-show in Avengers: Infinity War and Avengers: Endgame, even though the Adam Warlock character was essential to many of the comics those movies were based on.