I think i found out what happened to big mom and kaido , guess what they did experiment with big mom and kaido makes them kind huge and ugly - ugly part goes to big mom she was so beautiful in her prime days and now she looks like a ugly beast i think they did some test with her and failed...
Im starting to think that joyboy was from elbaf and a giant so perhaps those legendary giant that vegapunk was experimenting were from the past too but failed giants experiments + giant straw hat tooo makes sense
That is oden's body.. kaido son is dead and big mom help kaido to bring back his son to the body of oden.. big mom's fruit is a soul soul fruit that can put a soul in anything ..And that is why kaido had debt to big mom... end of the story [ the mask is there to hide the bullet on hes headband...
I got some info who might could join the fight
if u guys remember the page of marco in ship with neko there was a shadow guy talking there are 2 options like
1) it could be 100 % scoper gaban
2) shiki the lion itself
I give my money for this!
so this is my theorie the guy from back then we saw with crocus must be yamato 90% we see they having a conversation like they old comrada so i suggest it must be really oden :kizabat:
well my conclusion about this topic all I can say is are 2 options about yamato
first - yamato might a big fan of oda by reading hes book
second - yamato could be the lurking legend ( ODA is alive ) but somehow manipulated by brain lost memories idk