If oda recycles Skypeia but puts them on a world stage then:
The One Piece will be a massive Planetoid that will fly in the air (maybe even eclipse the sun for symbolism sake) basically Enels Fairy Vearth.
Imu and Luffy will have their final fight on this Planetoid high above the rest of the world
Nami will navigate Luffy up to the Planetoid on the back of Zeus like she brought Luffy up the Jack to the Ark Maxim
The clouds will be too thick but Zoro vs Mihawk will split the heavens here ending the fight and allowing Luffy and Nami to make it to the One Piece and allow Zoros dream of his name reaching the heaven and becoming WSS will be complete
Meanwhile Sanji will destroy an island destroying ship like he did on Ark Maxim (the lulusia weapon or pluton) elsewhere in the world.
Nami up on the One Piece will see the entire world with her own eyes and build her map completing her dream
End of the arc will be Luffy moving the Planetoid and stopping the eclipse and his silhouette will cover the entire world and people will know Luffy won.