So it seems Luffy being rescued is not the last pages so I'm curious as to how big it could be.
My guess is sea kings. If you go way back to Fishman Island, they talk about a certain "clan" being able to fix Noah. A lot of people assumed it was the "D." Clan, but it might actually be the Kozuki. We may actually have Wano officially open its borders and people travel to FI to repair Noah because Momonosuke can communicate with the sea kings and tell them what to do.
It aligns with Momo in pain last chapter too.