It’s not just killing a strong enemy 
It’s killing the unkillable creature that is kaido. To quote chapter 795: No People were able to kill him and that included himself. I said in one of my post to white crane maybe we were to ambitious in wanting to attribute to much to zoro in wano. Ultimately luffy is the Mc and upon the end of wano he got such things as the dawn,comparison to ryuma(which to me is luffy and zoro hype),toki hype etc. We know luffy does not kill so that’s the end of that basically.
Zoro on the other hand his connection with enma,the permanent scar, genuinely being that monstrous Samurai kaido needed, kaido saying death completes a person etc. the list could go on, could come later when oda/zoro is ready to make it happen then all the narrative set up in wano makes sense.
Also and I could get some push back, but Zoro is not ryuma…. He will be better than ryuma ever was he does not technically have to slay kaido over wano just like ryuma killed a dragon it would be just like oda to have the unkillable kaido killed on a grander scale for everyone in the op world to see. Narratively and power wise it could still make sense.
It’s killing the unkillable creature that is kaido. To quote chapter 795: No People were able to kill him and that included himself. I said in one of my post to white crane maybe we were to ambitious in wanting to attribute to much to zoro in wano. Ultimately luffy is the Mc and upon the end of wano he got such things as the dawn,comparison to ryuma(which to me is luffy and zoro hype),toki hype etc. We know luffy does not kill so that’s the end of that basically.Zoro on the other hand his connection with enma,the permanent scar, genuinely being that monstrous Samurai kaido needed, kaido saying death completes a person etc. the list could go on, could come later when oda/zoro is ready to make it happen then all the narrative set up in wano makes sense.
Also and I could get some push back, but Zoro is not ryuma…. He will be better than ryuma ever was he does not technically have to slay kaido over wano just like ryuma killed a dragon it would be just like oda to have the unkillable kaido killed on a grander scale for everyone in the op world to see. Narratively and power wise it could still make sense.
