If Zoro fights him 100% Solo with no help during start, during, and close to the end of the fight. I will take my word and admit I was wrong. Though I said if he would face YC lvl opponent, he needs backup, I don't mind if he does, but your not expecting me to see him solo YC after past 4 fights made him look bad especially fainting as worse of all.
Again, hard to say as most of you guys see Zoro vs Kaido as reality when it's fantasy and headcannon. If you want King vs Zoro more, I am not saying it won't happen much, but if he does face YC lvl opponent, he isn't soloing one by himself.