You know whats funny?
at the start of Wano, i remember a lot of Zoro fans (me included) saying we didn't want Zoro to be related to anyone important or have any lineage bullshit that would power him up, he rised up by his own actions and training
then, after those reveals that Zoro looked like Ryuma and Ushimaru, and he was also a one-eyed swordsman, many people got mad but accepted the fact that Zoro was related to them
then, we spent so many chapters waiting for Oda to reveal these fuckings things, but he never did, so in a way, we got what we wanted in the first place
it seems like Zoro isn't related to the Shimotsuki or anything like that after all
it could be just another one of those things, where Luffy looks like Ace and Roger, but isn't related to them