The theory was, that Kaido was trying to make himself the ultimate sacrfice for Nika, hence also his line about "men finding or becoming perfection in death" or something along those lines? What he said during the rooftop fight? Even if he isn't aware of Nika somehow or has this plan in mind, maybe King at least could be aiming to sacrifice Kaido somehow to appease Nika? The ultimate tribute in the strongest creature and warrior, Kaido?
Otherwise I would dig that
I honestly wouldn't mind if Kaido was written more like that, but I still want an answer on how and why he came to Wano and why he decided to work with Orochi and have this alliance with him? It might be simpler than I think to be fair, also Orochi's DF might have impressed him given what we know about Kaido's preferences for DFs too ofc.