Super Sommers could be a good opponent. King hadn't shown too much until just before Zoro vs King and he was powerful and required a lot from Zoro. I don't think Super Sommers will be a harder opponent for current Zoro, but after Omen he can be as strong as Oda wants.
I'm hoping he has awakening. We saw Luffy deal with it against Doflamingo and Katakuri, could be nice to see Zoro slice through tons of thorns reinforced with armament haki. Otherwise it just seems like a tune-up fight and that's ok, but I'd rather Super Sommers push Zoro to need to refine his ACOC after the Imu encounter.
Oda hasn't really built up Zoro encountering anyone this arc, so it's not like Zoro needed someone else, Super Sommers could work and I'm looking forward to it.