Eiichiro Oda, the author of One Piece, had plans for another manga after One Piece. Here's where this plan is at right now.

But, Luffy's journey is not complete yet, and it appears that Oda intends to draw many more adventures with the Straw Hat pirate, some even into his old age. As the protagonist of One Piece ...

Luffy, a teenage pirate who travels around the ... I was only given a pencil and a marker to work with, and while I could copy most of the drawing with my pencil, I couldn’t add a lot of details ...