It’s like I said
here,
Finding out that King is a Lunarian will change nothing about this fight lol. Oda is simply a dumbass who’s fans will accept whatever nonsense he throws at them. The real reason Oda is pulling this crap is because he needs to artificially extend the length of Zoro vs King to meet some arbitrary “chapter quota” set by the Shonen executives.
This follows Oda’s time-honored writing philosophy of “if you can’t make it good, make it long as fuck” so that people will mistake the relief that they feel when Zoro vs King ends with the fight itself actually being good. When so far, this fight has been as low-quality as every other fight in Wano, with Oda forgetting what he even wrote last week as dementia slowly envelops his mind. From King’s suddenly repaired helmet, to King’s initial lack of interest in Zoro’s orthodox fighting style to suddenly and weirdly craving a sword-fight with him, Oda is truly hoping to bombard his audience with so much meaningless crap that they forget what happened even last chapter.
This ensures that no matter how low Oda sinks as a writer, and no matter how shitty his own series becomes, his fans will continue to rabidly consume every filler chapter he throws at them without knowing how to tell if this shit is even good or if Oda has even stayed consistent to the story he has begun telling.
So long-story short, Zoro finding out that King is a lunarian will obviously net him absolutely 0 benefit towards winning the fight, and will not grant Zoro any new tactical knowledge that allow him to win, since Zoro will ultimately win the fight using generic cool-pose attack #56 with no regards for King’s race.