Seeing the full translations of the King vs Sanji panels,I'm starting to get the feeling that isn't King's decisive final matchup of the arc.
King seems to be having fun pursuing and torturing Sanji.
Sanji is already on the defensive side with King's beak attack even though he wears his raid suit and I doubt he does anything to King in the upcoming chapters except becoming invisible and try running away,but may be that's just my feeling.
On the other hand,I think Sanji tanked that King's beak attack that even Luffy considered dangerous and will be probably fine and clean next chapter.
Lastly,Sanji vs King happening this early is no good for Sanji as even Luffy's fight has been delayed for Mink action.