I was waiting Zunesha to destroy the CP0 ships.
About the opening of Wano borders, seems like its a fisical thing, to use the lava to destroy the "rock fortress" and move Wano mainland to sea lvl. Wonder if this have something to do with the Ancient Weapons, as seems to be something created to protect Wano after the Void.
A Shogun Hiyori would basically confirm Momo as a SH, and connect with whatever he says to Zunesha, that he want to go to Laftel before the opening of the borders.
But what about Yamato???