Luffy and Zoro continue to do what they always do. Kick arse and get lost.... And they are all out of arse to kick.
Kidd and Killer probably round up some of Kaido's leftovers in an attempt to be relevant enough to challenge Luffy. A few towns might get wiped off the map in the process. World Government will give them bounties equal with Yonko because the bounty system is wack.
Law will continue to follow Luffy since he practically owes Straw Hat a life debt after he achieved Law's life goal for him. Besides, who else will make plans for Luffy that he will ultimately ignore?
Capone Bege will take over the Underworld, become the new Joker, lead a happy and successful life, have loads of kids and die of cancer from too many cigars.
Bonney will retire to Whole Cake Island and eat and drink all she can because when you can just revert yourself to an earlier age, you can go crazy now with no regrets or consequences.... Come to think of it, is Bonney immune to old age?
Hawkins' will spend the rest of his life trying to pull himself together.
Apoo quits piracy after realising the pay sucks and becomes a full time DJ.
Drake will do something boring.
Highest Lord Urouge, beloved God of Memes will continue to enlighten the masses to the Way of the Mad Monk. He shall ascend to the Great Silver Orb of the Heavens and promptly teach that long lobed lug what a real God looks like.
