Maybe i am running in the wrong directionโฆ but Yamato Pretty much could be related to Oden. I mean the clothes speak for themself. But his size Looks way more like Oden then Kaido.
Wouldnt it be possible for Kaido adopting Tokis child when she died, cause of respect to Oden? Raising him as his own son, teaching him, but seeing him still wandering in direction of Oden.
That would also be a solution for the aftermath of Wano. For now the Problem is, when Wano is free, who is going to be Shogun. Momo is way to Young. And everyone else is not part of the Family and thats the whole thought. So Maybe it is Hiyori... but an older brother, if it would exist, would be perfect. The strength and Training from a yonko, mixed with the genetics of Wanos historyโฆ Sounds damn good to me for Shogun.