Allow me to build a theory on top on this one.

Seems like Kaido vs Luffy will be a fight between two guardian deities, or two beasts: The Lion vs The Dragon.

Luffy = The Lion
Kaido = Dragon (Duh) https://twitter.com/EtenBoby/status/1305295109110616068

In Chinese culture, the dragon represents power, the lion strength. Their dances at the Chinese New Year are said to bring prosperity and good luck.

Wano has had a string of bad luck because it has been under the dominion of a false guardian deity, the dragon Kaido. So in order for Wano to find its good fortune, it needs the dances of the lion and dragon.

In my opinion, Oda foreshadowed this fight as far back as Strong World. Shiki perhaps saw himself as the lion who would challenge the dragon for supremacy, but instead was defeated by the true king of the beasts, Luffy.

How does the courageous lion defeat the powerful dragon? The dragon wields corrupted power, while the lion has strength of character, which inspires the highest kind of loyalty even among pirates, a more formidable power according to Mihawk.

Perhaps the fight btw Luffy and Kaido itself will symbolize the dances of the dragon and lion, which will break Wano's curse. Or perhaps after Kaido is defeated, Momo the true dragon will have emerged, joining Luffy in a ritualistic dance for prosperity and good luck.