Kaido would have dug his own grave if he had reached Marineford to fight the Paramount War.
WHAT IF Kaido CAME TO Marineford?
After the introduction of the Marineford arc, the majority of anime viewers worldwide abandoned their favorite shows in favor of One Piece. The arc was a perfect package as it combined the excitement of war, the excitement of family reunion, and the sadness of death in the series, which is quite unusual for Eiichiro Oda to draw.
But the aspect of the Marineford arc that attracted fans the most was the first experience of seeing the unimaginable strength of an Emperor of the Sea. Although Whitebeard was extremely ill, the World's Strongest Man managed to turn Marineford upside down. Now imagine what would have happened if Kaido, the strongest being in the world, had joined the war.
A One Piece fan recently talked about the death and destruction that would have happened if Kaido had joined the Paramount War. But fans theorize that he might have ended up defeated or captured by the marines as there were some heavy hitters from the navy side.
