In this video, Morj believes the rest of Zoro's story in Wano is realising that he has Conquerors and that he has to start using it consciously from now on. By the end of WAno, Zoro will have to get his Conquerors under control and that means he has to get into another high diff fight to pull out the Conquerors but this time he won't do it at literally death's door. He will use it like Mid fight and start using regular CoC slashes.
And Morj thinks there's no one better for this than King