User blog comment:Kaido King of the Beasts/Chapter 818: Stepping Stones to One Piece/@comment-7606564-20160303181833

So luffy is going to have to go after the real blocks because it'd be way too easy to find copied papers of them (Luffy doesn't do things the easy way). Plus the copies could be wrong. Or perhaps they get their hands on one but it leads them to a trap. That could be a whole story arc in of itself. Like idk... Kaido leaks a fake paper that leads to one of the three calamities, and the strawhats have to fight for their lives. Idk, it's possible

Any guesses on where the fourth stone is? Names that come to mind are

Shanks, Whitebeard pirates, Mariejois, Marines, Rayleigh, maybe skypia???

I also got this feeling that black beard is going to kidnap either robin, or one (if not all) of the stones.

Finally, anybody else got this weird vibe from the chapter that robin is eventually going to die?