So I guess Oda had indeed already thought of this idea of Yamato getting confronted by Blackbeard on the grounds of Blackbeard wanting to go there for the Road Poneglyph Kaido had. I'd imagine Blackbeard wouldn't go there for now assuming Law doesn't escape away with that info, but now this chapter makes me wonder what other reasons Blackbeard would've to go there, like to get Pluton or the bodies of Big Mom and Kaido so as to get their fruits.