As you might recall, Warlock was a Sovereign created by Ayesha to be a living weapon with the programming to kill off the Guardians. However, Warlock wasn’t very successful in his attempts to destroy the misfit superhero team, and during the Guardians of the Galaxy Vol. 3 ending, he ended up joining the new Guardians team led by Rocket the Raccoon.

Doomsday so far. The team last appeared in director James Gunn's last Marvel Cinematic Universe movie before he left to co-run DC Studios and the new DC Universe. Guardians of the Galaxy Vol. 3 saw the original version of the team disband,

We’ve compiled an extensive list of active characters and actors from various MCU films and television shows that currently aren’t in the next Avengers movie. This does not include individuals like Elizabeth Olsen’s Scarlet Witch, whose status remains ambiguous, or “retired” characters like Chris Evans’s Steve Rogers.