I'm seriously hoping that they get to the One Piece, and everything is happy.
UNTIL
the Marines somehow catch Luffy in the following months. Luffy is okay with it. His adventure is over. It's time to go like a champ. He gives in only if they let his crew go, and eventually agree.
They are going to execute him in Loguetown, the town of the beginning and the end. Everyone he has met in his adventures is there. It's a parade of tears and sad, angry faces. "Any last words?" Gold D Roger-like dialogue.
Then an explosion, and the rest of the mugiwara crew bust in, catch Luffy, and gtfo there. Off to more adventures! Yay!
Or Luffy gets executed and his hat falls off his head onto the crazy little kid who got inspired to be a pirate.
Either way, I don't think it'll be anytime soon. Hahaha