
Imo I still think the main conflict will have to do with the return of big mom and her crew. Doubt it’s going to be as serious or deep as wano or egghead imo especially if it’s another arc with big mom in it. A shorter Davy back fight style arc could be perfect imo
Big mom being one of the fun loving old school piratey pirates out there would probably be more than down. Plus it’d be a good chance to quickly show off a lot of her crew and their powers and personality without them all needing fights

As for what they could have on the line? Pretty much every from their crews to their treasures to their territories
It’s implied there are different versions and rule sets to the game so maybe it could be a winner take all situation

Also Kuzan like long ring long land should reunite with the strawhats at the end of the arc and have a fight with luffy. It ending in him giving us info on the bbp