oda has the opportunity to make a great manga where the main character isn't invencible and the other character defeat antagonist (zkk) or making another naruto
Do you think the rest of Onigashima can beat him?
Zoro is unconscious and in a bad state, he wouldn’t be able to beat Kaido.
Sanji is unconscious and can’t hurt Kaido
Kidd/Law have zero stamina left
Yamato can fight him for a little while but she was getting beat earlier.
Momo has no fighting skill
if Kaido goes to the live floor he’s destroying the wounded alliance