By Oda's own words, Doffy was supposed to fight alongside Kaido in Wano. That's why he was called Joker. K/Q were not fighting beside him.
It's clear originally Oda had something like:
Luffy v. Kaido
Kid v. BM
Law v. Joker
Zoro/Sanji v. King/Queen
But he said he was surprised by how far Law had come. So he got rid of Doffy early, and downgraded Kid/upgraded Law to take down BM.
Luffy grabbed Kaido. Not sure why we keep having this convo. He's grabbed even Kizaru multiple times.
It's clear originally Oda had something like:
Luffy v. Kaido
Kid v. BM
Law v. Joker
Zoro/Sanji v. King/Queen
But he said he was surprised by how far Law had come. So he got rid of Doffy early, and downgraded Kid/upgraded Law to take down BM.
Luffy grabbed Kaido. Not sure why we keep having this convo. He's grabbed even Kizaru multiple times.