No that’s the fandom’s headcanon, there’s was no mention of an Oni race anywhere in the series. Plus I know that you guys are hoping for a plot point where Kaido is mad because humans were racist against him and were discriminating against him that’s why he wanted to become Joy boy because he wanted to end the discrimination he suffered but at some point he gave up on being Joy boy and decided to create a world of violence.
This is the fandom’s headcanon about Kaido and what they hope his story will turn out to be but isn’t this a recycling of Arlong’s and Hody’s backstory? What is new about this storyline
Finally the special one in the beast pirates was always King due to his Lunarian heritage not Kaido and some BS Oni storyline, that’s why you’re setting up yourselves for disappointment because your wet dream didn’t come true
No such thing as Oni race exist and I refuse to believe this