Joseph

Caribou has already told blackboard so that's inevitable honestly an that's where luffys going to have to go next. He needs that redemption arc for ace but garp needs to be saved this time. An on top of that koby won't let that go an he's been hunted by shanks for a long time so whose to say they don't all show up there alongside the marines an that's the start of the big war.

I think lodestar will be last bc I think personally Luffy needs a redemption arc showing he's changed an how he's progressed since marineford before the final battles can even start are maybe that's the start with him fighting Blackbeard an akainu an then decide to try an out ake them both down so Luffy gotta whoop the whole navy an Blackbeard at the same time just to save garp would be most excellent to me. Or hell maybe him shanks an blackbeards crew all fight on the island an it becomes another all out brawl cause y'all are forgetting dragon an the revolutionarys too I mean that's his dad he went to save Luffy an he was a marine who disagreed with the navy so he still has justice in him so I think we gonna see a good fight coming up that depicts god island incident where everyone shows up to fight