Zoro vs S-Hawk would be such a poor writing
There is no challenge in it whatsoever.
Seraphim are just children, with extremely bad CQC skills.
Weird thing considering he should have Mihawk's skills but I guess at that age Mihawk was the same.
It would only be waiting for the flame-off moment to off him type of thing.
He already fought him as well so repeating it wont do anything new.
Luffy is covered with Saturn.
There are no obstacles for Zoro vs Kizaru.
Unless he wants to move all this Marine force and do nothing with it.