A
It seems to be certain that at least one of the Yonko commanders have CoC haki Katakuri has it and you can bet King and even Queen might have it as well , Roger has Oden and Rayleigh in his crew who has , and we know that Zoro and Sanji are going to be the strongest after Luffy as they always were. so without doubt they will unlock it at some point . do you think it is possible that they will unlock it in this arc. they are going to fight CoC user anyway.