an expected response from an oda dickrider, there's more narrative build up for ZKK than G5 ever got, but you'll ignore all the build up, and discard the theory simply because "ZorO Is nOT thE mAIn CHAracTeR", and in the same time praise the nika retcon as peak writing.
luffytard should keep their mouth shut.
zoro could barely stand in chapter 1010, no one expected him to do anything let alone scar kaido.
but chapter 1035 set things straight, for zoro's true power and capacity
kaido is a dragon, and therefore he will get one shotted by zoro. it's an official fact.
like i said, it's only a matter of pay off.