I think we’ll get Jinbe vs Topman
He’s the fattest and tanktest of them all
Sanji vs Mars would be awesome because we would get a sky battle
I already pointed this out
I think Luffy will go down pretty soon, we've got a lot of him fighting, and we'll get:
V. Nusjuro vs Zoro (V. Nusjuro and Zoro are from Wano, Wano is the Land of Gold, Ethanbaron is the God of Finance)
Ju Peter vs Sanji (God of Agriculture, I think the Vinsmokes were once Celestial Dragons that left like Doffy's family)
Mars vs Jinbei (Fish vs Bird, Sky vs Sea. FIshmen have always yearned to live above the surface, Mars is a bird who can fly freely anywhere. Jinbei is a literal fish in a series that's incredibly ocean focused, Mars in the God of Environment, most of the One Piece world's environment is the Ocean)
Warcury vs the Giants because I think he'll fight Sabo in the end game (Warcury's forehead mark is a burn from a former Mero Mero user IMO)
Saturn vs the Ancient Robot and Franky (already got a bit of this, I believe Saturn is from Vegapunk's Island, Karakuri, that Franky studied at, and also was responsible for the creation of the Ancient Robot, in the sense he forced a scientist, like Vegapunk, to turn a giant into a robot. Hopefully the Giants recognize the Ancient Robot)
York will order the Seraphim to attack the Gorosei soon, too, and I think Bonney and Kuma will end up fighting in Nika forms, too.
