Yes sure, possible. But obviously, exactly this was Zunishas job. That’s why Zunisha was in wano. But Momo send him off again.
what misspleases me here is, we only get more mysteries and not one reveal at all. Why want Momo the borders still closed? Why was the walls build? What is pluton? When will it reveals? What is to condition to reveal ist / open the borders? And so on…
at some point, one or two answers would be great.
I think Pluton is the corpse of Joy Boy, and Onigashima is the skull. That's why Kaido was trying to drop it on the Flower Capital: to reconnect it to the rest of the skeleton.
We know from Franky that the reason Pluton's instructions were passed down was to create a counter-measure to the OG Pluton. I imagine the Sunny is that counter-measure.
Ancient Wano is underwater: the current country was said to be formed by walls being erected. Who could do that? What else is a giant, mysterious wall? The Red Line. Oars was a continent puller.
I think Joy Boy was a continent creator: he liberated people by making new islands. Joy Boy, or Pluton, was so strong, he could pull up the earth from below: creating both the Red Line, and Wano's border walls.
Look at the panels showing Wano's creation when Sukiyaki is talking. It goes from there being no land around Mt. Fuji, to there suddenly being land there. How? Well, if Oars could pull continents... why couldn't his ancestor carry them? Wano's islands all come from different parts of the world, because they are what remains of the Ancient Kingdom.
As the AK fell, Joy Boy carried the remains of its islands on his head, like a hat, until he reached a place he could form walls around, to keep it safe. Pluton, the corpse of the continent creator Joy Boy, still lurks beneath Wano to this day, waiting to somehow be revived.
Who was last seen falling into a giant hole in Wano? Who is capable of putting her Soul into things to make them come alive? MAMAMAMAMA just got a big new toy, IMO.