While no official plot details have been revealed for Guardians of the Galaxy Vol. 3 have been revealed yet, the currently-playing Avengers: Endgame did hint at what might be coming up by showing Thor accompanying the Guardians back into space and Star-Lord looking for the past version of Gamora, who is now running around the present day MCU. Let’s also not forget that one of Guardians of the Galaxy Vol. 2’s mid-credit scenes set the stage for Adam Warlock to eventually be brought into this universe.