Could just be everyone. Really only Franky vs Sasaki is "solidified"
Like we dont know:
- If Nami and Ussop are fighting Ulti AND P1 or just Ulti (they've only been fighting Ulti thus far)
- We don't know how Chopper will be involved (maybe with the above?)
- We don't know of Brook will be with Robin to fight Black Maria or if Robin will be alone
- And we dont know if Brook would then maybe take over Jinbe's fight if Robin is taking over Sanji's
- Finally we dont know exactly who Yamato is fighting (if she is), and who Sanji/Jinbe may fight id they are freed from their respective F6 fights.
Tons of factors we just don't truly know yet, literally outside of only Franky.
Edit: yeah it entirely sounds like this chapter will further solidify the Strawhat matchups