In all seriousness, I think with that Awakened Luffy song reveal and the context, we might be getting a New World equivalent moment of this happening in the anime when it eventually gets to this point ofc!:
Absolutely freaking glorious and unforgettable moment in the anime, the New World Symphony was such an ICONIC and perfect inclusion to this scene!
I wish it could have returned vs Doflamingo but at least have this!:
Ironicaly it would have been even more perfectly fitting for Doflamingo who is the "New World Crocodile" in some ways too ofc! He wanted to ally with Crocodile too lmao.
Kaido is sort of like Crocodile too with the trust issues and maybe even become a future unexpected ally like Crocodile was, a sort of neutral/anti-hero figure that ends up helping Luffy and even saving his life and or others close to Luffy and such like Crocodile at Marineford especially?
This is assuming Kaido doesn't die as expected by many ofc, I don't think Oda will actually want to kill off Kaido now but we'll see what happens.
Big Mom could also be linked to Crocodile with the whole trust issues thing and gangster themes too ofc.