I don't think zoro already clashed with S-Hawk and next chapter we might see CP0 - CoC duo vs Seras.
However, I don't think seras are losing in this arc.
They got introduced just now and still in developing stage. I don't think oda would make them lose in this arc.
I am expecting Zoro vs kizaru clash. But there is no setup or buildup for an admiral to go down this arc.