I mean a lava can't kill him but oda probably won't use him again

@Yımorta He probably won't reappear but he definitely didn't die.

I think that Big Mom may come again this arc, but I don´t think Kaidou ever will, because the fight between him and Luffy took so long. I don´t think we need round four.

But actually, him as an Ally for the final Saga instead could be pretty cool, now that I think about it.