Delusion.
"That was before Luffy lost"
After Luffy lost:
Literally Zoro has made zero comments about fighting Kaido again. It was his suggestion to go to the performance floor. He's not even involved in the conversation to defeat Kaido.
Typical denial and delusion that is founded on confirmation bias. The goalpost shifted a 100 times with Zoro vs Kaido and/or ZKK. At first it was about defeating King, then him having a hand at defeating Kaido. Then it became about directly defeating Kaido and Zoro "never" leaving the roof. Then it became about "He has to slay Kaido over the capital, so of course he'd lose on the roof!"
Now it's magically about him recovering and going back to...the roof? For Marco to repeat the same exact throw to the roof? For Zoro to magically say "he" will defeat Kaido after explicitly saying Luffy?
Face the music guys.