I was lying on my bed when I remembered the "Kaido isn't the final opponent in Wano" post and I started thinking about Kaido and our boi Zoro. Imagine a stronger enemy appearing in Wano (that would make Kaido the 2nds strongest foe) and Luffy is required to defeat said enemy while Kaido is still standing, but Kaido isn't the only one standing because so is Zoro. Now just imagine Luffy going after the new enemy while saying "Zoro, you know what to do with Kaido."
Just imagine it...