If by finish you mean "kill" there is actual buildup and hints for Zoro being the one to kill Kaido and ZKK has been analyzed and discussed to death. You can find a lot of material on that here. Everything considered, I find the theory very plausible at the least and yeah, I strongly, strongly believe that it's going to happen.
I also think that Luffy will ultimately win in a 1 vs 1 fight against Kaido and this has been built up as well.
People were saying some of most diverse shit about Zoro and what he was going to do/how strong he was, before Wano. It turns out that he surpassed a shit ton of expectations. Many were/are very quick at labelling some Zoro fans "cancerous" or "zorotards" for some of their takes. Heck, if Oda created a random account on Reddit before the raid and gave some predictions of what was going to happen on the rooftop, you can bet that he would be have been the target of such terms as well. And look at where we are now.
Of course fans can be excessive in their expectations or how strong they think he is (looking at you
@nik87) but anticipating exceptional things from Zoro is perfectly fine. Oda is his first fan.