Laying aside powerscaling for a bit (justified as Oda seems to care much less than the fandom about consistent powerscaling) and looking just at the story, last chapter caused me to make a significant update in the direction of King being Sanji's main 1 vs 1 opponent.
The hypothesis that King is Zoro's main solo fight did not predict last chapter (it would have judged it unlikely). Thus, last chapter was significant evidence against King being Zoro's main solo fight.
On the other hand, the hypothesis that King is Sanji's main fight would have predicted a chapter like the last one (it would have judged it likely). Thus, last chapter was significant evidence for King being Sanji's main solo fight.
There are still significant chances that King is indeed Zoro's solo fight (the fight is interrupted, Sanji is used as a hypetool, etc.), so it's far from a foregone conclusion that Sanji will face King as his main 1 vs 1 fight.
That said, regardless of your priors on the two matchups, last chapter should have caused a significant update in the direction of Sanji vs King (and away from Zoro vs King) due to the aforementioned reasons. Of course it's still possible to believe that King will be Zoro's main 1 vs 1 fight, but you should be less confident than you were before.
If you read last chapter and you're just as confident as you were before that King will not be Sanji's main 1 vs 1 fight, or that King will be Zoro's main 1 vs 1 fight, then you're doing something very wrong.
The hypothesis that King is Zoro's main solo fight did not predict last chapter (it would have judged it unlikely). Thus, last chapter was significant evidence against King being Zoro's main solo fight.
On the other hand, the hypothesis that King is Sanji's main fight would have predicted a chapter like the last one (it would have judged it likely). Thus, last chapter was significant evidence for King being Sanji's main solo fight.
There are still significant chances that King is indeed Zoro's solo fight (the fight is interrupted, Sanji is used as a hypetool, etc.), so it's far from a foregone conclusion that Sanji will face King as his main 1 vs 1 fight.
That said, regardless of your priors on the two matchups, last chapter should have caused a significant update in the direction of Sanji vs King (and away from Zoro vs King) due to the aforementioned reasons. Of course it's still possible to believe that King will be Zoro's main 1 vs 1 fight, but you should be less confident than you were before.
If you read last chapter and you're just as confident as you were before that King will not be Sanji's main 1 vs 1 fight, or that King will be Zoro's main 1 vs 1 fight, then you're doing something very wrong.
regardless of who faces who or who takes down the enemy, the community is always right