I know people are getting hyped about this but i want to remind everyone that this has already happened before. Oda already baited this Zoro lineage with the "Sunachi", "Wado Ichimonji" and Kozaburo situation. As a reminder, Oda in an SBS at the start of Wano said there is a familiar character who descended from Wano people. Then we learned Zoro is familiar with certain Wano words. Then we learn Zoro's Wado Ichimonji was made by a Wano blacksmith. Turns out this was completely about Kuina. Zoro knows Wano dialect because he heard the founder of his village, Kozaburo, say it. And Wado is the same as it has always been, a sword Zoro got from Kuina's father because he asked for it and proved his dedication to the same dream as Kuina.
Now the Bait is back. After none of the above having actually gone anywhere, Oda is laying it on thick. There's a samurai, Ushimaru who looks remarkably like Zoro, with similar fighting styles who happens to be related to Ryuma and the same Kozaburo who founded Zoro's village. It's a slam dunk now right? Hell there's even a "fate" thing with Zoro returning Shusui to Wano.
Well... why doesnt Onimaru recognize or care about Zoro's remarkable likeness to Ushimaru? Zoro was trained by Wano Samurai so why wouldn't he have a fighting style similar to them. In fact he was trained by people from the exact same family as this Ushimaru person. It's not like Zoro inherited a fighting style through his genes.
Zoro also returned another sword to Wano, Sandai Kitetsu. It was made by Hitetsu. Shouldn't that mean Zoro has some tie to Hitetsu similar to how returning Shusui means Zoro is tied to Ryuma. Uncanny resemblances go as far as Tashigi looks exactly like Kuina despite them being unrelated. And again, Zoro having One eye isnt a biological factor to tie him to Ryuma in anyway.
That's not even to mention how the timelines of these things don't work at all.
This seems like bait to me. Especially because Zoro is uninvolved entirely. Why would his lineage matter if he doesnt know or care about it? if someone were to tell him "Hey, you look exactly like this one guy we knew", wouldn't zoro just remember Tashigi and Kuina and say "So? Where's the damn booze?".