User blog comment:Staw-Hat Luffy/About Kaido/@comment-3425840-20130130180655

He is the strongest creature in the world, but where does he rank is the hierarchy if we include humans to the list. I mean are humans a sub-set to the creature category? If so then Kaido could be even more powerful than Whitebeard (theoretically, note he also wanted to take Whitebeard's head). although I seriously doubt that.

Kaido could be in my opinion either an Awakened Zoan user (thus the Beast) epithaph, or some other speices like giant, mink, fishman etc as he is stated as not a human.e

I don't think he is going to fight Doflamingo, recall the aftermath of Doflamingo's attack on Moriah, he was talking to some high ranking government official over the phone and there he said that if the government bosses him around too much then he is going to quit being a Shichibukai. So I think he does not regard is Warlord status as a very important deal. Which makes me think that he will quit being a Shichibukai as per Law's demand and then try to get back to Law and Luffy for causing him the trouble.

Also Doflamingo is on business terms with Kaido, he is not his crew mate so we do not know if Kaido values his crew mates or not, however his image so far seems like a ruthless individual to me.

On a side note, Shanks and his crew managed to reach Marineford unscathed (assuming from their appearance) even though they had a square off with Kaido, which makes me wonder how powerful the Red Hair Pirates are, especially after Kaido's introduction as the strongest creature in the world.