There is a reason a fodder named Kinemon, who got no-diffed by Law, was able to do something to do against Kaido in team battle. Oda told us don't get high expectations just because you see those 2 out there.
It doesn't mean anything unless Zoro and Killer do something better than the Scabbards, who ended up being still fodders. I expect from Zoro to use Oden's sword, which is Kaido's fear and his weakness, to open up Kaido's already damaged scar. Then lose like the Scabbards. Zoro has the kryptonite of Kaido right now (Oden's sword) that's why it makes sense he is there.