What I wish could happen in Guardians Of The Galaxy Volume 3
Annihilus is the bigger bad and resurrects 2018 Thanos for his own purpouses. Thanos sees that his snap has been undid and decides to do the same thing his 2014 self wanted to do in Endgame, only this time he doesn't have the stones and uses the cosmic powers Annihilus given to him (Galactus itself would be still too much) to wipe out populations planet after planet. Star-Lord and Thor have the chance to take a proper revenge on Thanos but they need to learn to get along if they want to beat cosmic-powered purple chin. Adam Warlock mentors them in how to fight cosmic power, after after having explained the Sovereign affair and that he couldn't care less of what Ayesha wanted him to do to the Guardians. Basically he wandered around space during all these years, learning all that he's now teaching to Peter and Thor
