Holy fuck i didn't know about this theory.
It seems that since Dressrosa arc there was a japanese theory about Joyboy saying that Kaidou was Joyboy. The reasoning was very simple
How do you translate Joy boy in jp? 快童, How can you read that? 快(KAI) Joy 童(DOU) boy.
It blew my mind that there was a theory about this since dressrosa and Oda made now(well actually chapter 1014) a connection between them
It seems that since Dressrosa arc there was a japanese theory about Joyboy saying that Kaidou was Joyboy. The reasoning was very simple
How do you translate Joy boy in jp? 快童, How can you read that? 快(KAI) Joy 童(DOU) boy.
It blew my mind that there was a theory about this since dressrosa and Oda made now(well actually chapter 1014) a connection between them