Now that Kaido has been weakened enough that Luffy can do his 1v1 against him, I see Luffy, Zoro and Sanji fighting like this.
Luffy (and Yamato) vs. Kaido (round 1)
Luffy vs Kaido (final round)
Zoro against the king I think Zoro will somehow be cured by Marco, Chopper or Law. He will face the king Number 2 versus number 2
Sanji vs. the queen Sanji will face Queen, number 3, just like Sanji.
We will see Sanji and his limits with the potential of the raid that follows. I think Sanji will surprise us with his observation haki which is very developed