Think Zoro vs King will be two more chapters.
The next chapter will be very much like this one was for Sanji, some more fight and them Zoro will end King with a CoC attack in the last page. But them the chapter after that probably Oda will show King suit being destroyed by Zoro attack and show how he look like, and that could turn into things like a small King FB, King telling Zoro something about Lunarians or Zoro realizing something about King's race.
If the Lunarians have somethings more, could be that them King will get up one more final time and use some "Lunarian Ultimate Power" and after that Zoro beat him, and pehaps even turn one of the blades black.
Would be cool if this "Lunarian Ultimate Power" break Sandai, giving more development to the fight, and opening the possibility for Zoro to get Nidai after the raid end. And also Zoro could finish him with some one sword style move, like the one he used against Ryumma, and after that move the sword turn Black.