Zoro has, at most a minor connection to Wano because some people in his village were from there. He's been confirmed to not be a Shimotsuki
The Ryuma parallel was fulfilled when he beat King by cutting the fire dragon.
Still holding on to a crackpot theory like ZKK at this point is just setting yourself up for disappointment. It always had flimsy support at best and now the idea of it happening is practically absurd.
Off the top of my head, 4 characters who are more likely to kill Kaido than Zoro:
- Luffy
- Yamato
- Momo
- Kaido himself
The level of coping is insane.
There's mountains of information supporting ZKK but of course anybody who disagrees with it just ignores the information.
Nobody has ever looked at a technique that's in the shape of animal and consider that technique the real animal. His battle with Kiing didn't happen above the capital and there was no way there to witness it.
It is funny when some claim King's dragon flame technique is ZKK but at the same time claim ZKK is a crazy theory and there's nothing to support. Which one is it?
Zoro has major connections to Wano. He grew up in a village that was founded by a Wano samurai and blacksmith. All his swords comes from Wano. His basic swordsmanship comes from Wano. Zoro looks like Ryuma and even has one eye like Ryuma. That's just a few of his connections.
Zoro is the only one capable of Kaido.
- Luffy doesn't kill.
- Yamato is not strong enough. She acknowledge that.
- Momo is not strong enough.
- Kaido can't kill himself. He tried and failed.