There’s a narrative for Kid Killing Kaido. The reality however Always been Luffy the MC. When Kaido falls, We can all rest easy knowing nobody rewarding Zoro with the credit for Kaido defeat. Let alone something much better like, Killing him....
ZKK not even in the realm of possibility. Post Wano about Law/Luffy/Kid defeating the Yonko. Why the fuck would Oda undermined that with Zoro killing a Yonko?? Makes no narrative sense