First, both are no. 2s. Sabaody was the passing of the torch from Rayleigh to Zoro with their enemy kizaru.
Second, when fighting seriously, kizaru is a swordsman. Rayleigh was his serious fight and he showed a light saber.
Third, admirals are portrayed equals so they would be defeated one at a time instead of one arc where the 3 gets defeated at the same time. M3 power levels aren't the same so they won't be defeating the admirals on the same arc. Since zoro is the strongest of the crew, then he defeats an admiral first, followed by Sanji against aokiji then Luffy against akainu.
So yeah Zoro vs kizaru is happening this arc.
Second, when fighting seriously, kizaru is a swordsman. Rayleigh was his serious fight and he showed a light saber.
Third, admirals are portrayed equals so they would be defeated one at a time instead of one arc where the 3 gets defeated at the same time. M3 power levels aren't the same so they won't be defeating the admirals on the same arc. Since zoro is the strongest of the crew, then he defeats an admiral first, followed by Sanji against aokiji then Luffy against akainu.
So yeah Zoro vs kizaru is happening this arc.
