Luffy is gonna have a huge punch on hybrid Kaido and Kaido will look defeated.
Readers will think it's over, "the theory of ZKK is dead", etc...
Then Kaido gets back up and flies in the sky going towards Luffy.
The country of Wano will see Kaido in the sky, they will be shocked and so will the reader.
Kaido attempts to come back to Luffy, but Zoro will kill him instead.
Similar to Thriller Bark, the shine will be on Zoro.
Sure, Luffy defeated Moriah, but the spotlight of the arc was Zoro taking all of Luffy's pain and surviving.
This will be a nice contrast to how Zoro's training (to protect Luffy) has actually paid off.
Of course, people now say "b-but... then Zoro would look stronger than Luffy!!".
Not true, people will still argue in the future. Nothing changes...
Luffy fans will say defeating Hybrid Kaido is more impressive.
Zoro fans will say killing Dragon Kaido is more impressive.
The ambiguity remains.
Here's how I see the volumes playing out.
Volume 99 - Yonko v Supernova
^ This would be till around Ch. 1004
Volume 100 - Alliance v Beast Pirates
Volume 101 - Alliance v Beast Pirates (cont.)
Volume 102 - Supernova v Yonko (cont.)
Volume 103 - Kaido's defeat, ZKK, and the big celebration.
Roughly 40-44 more chapters.