According to the search results, the fate of Kaido after the Wano arc is unclear. In the final battle, Luffy used his strongest attack, Bajrang gun, to knock Kaido out and send him crashing into the underground of Wano, where he landed in a pool of magma along with Big Mom. As One Piece Chapter 1050 announced Luffys victory, the volcano in which Kaido and Big Mom landed erupted, and the two likely flew out of Wano Country as the eruption was of a grand scale and even clouded the skies above the country. While some fans believe Kaido may have found a way to survive, others speculate that he may be dead, given the scale of the eruption and the fact that Big Moms death has been confirmed in a later chapter. However, it is also possible that Kaido and Big Mom are alive but in a very bad physical condition, and the World Government ships outside Wano Country could seize them if they sight them. Ultimately, the fate of Kaido after Wano remains unclear, and fans will have to wait for future chapters to find out what happened to him.