Recently I've been thinking about how this colossal series could ever end, and the final heartstring-tug Oda has prepared for us readers/viewers in the final chapter. I think its suffice to say that the Strawhats are going to find the One Piece and Luffy will become the pirate king and what-not, But what after that? I Propose that One Piece will end with Monkey D. Luffy's execution. Bear with me. I believe that another, much bigger time-skip, in which the crew has gone their separate ways, created their own crews, fulfill their dreams, and all come to Logue town to see off their previous captain. As a parallel to Rogers story and execution, I believe that Luffy will turn himself in for whatever reason, whether it be he was somehow overpowered, or perhaps he had all the fun and freedom he desired. I think, much like Rogers execution, will be a massive deal in the world and a massive crowd of people he's helped out, and enemies will come to see Luffy's execution. One by one, the previous straw hats will arrive at Logue town to see their captain for the last time, Zoro; The worlds greatest swordsman, Nami; with a map of the world, Usopp; An actual brave warrior of the sea, etc. It will go into each Strawhat's first encounter with Luffy, and how it inspired them to achieve their dreams, and help him on his journey. With the straw hats in the giant crowd, Luffy will announce that he has hidden the One piece, just like Roger, before his execution, sparking a whole new age of pirates. Before Strawhat Luffy dies at the hand of the marines, Each of the straw hats rolls up their sleeves to expose the cross on their arms, replicated from the end of the Alabasta arc, in the "silent goodbye". Shanks is shown on the outskirts of the crowd, now in possession of the titular straw hat, and says goodbye to Luffy, and congratulates him for proving him wrong. And on the island where Luffy's amazing adventure in the grand line, where the previous Pirate king died, Straw hat Luffy dies, with a massive smile on his face.