This article is about a movie that has yet to be officially released. Nothing but facts should be added to it, and speculation is prohibited.
One Piece: Stampede is an upcoming movie scheduled to be released in Japan on August 9, 2019. It will commemorate the anime's 20th anniversary. The news was first announced following the broadcast of Episode of Sky Island.
The movie takes place during the Pirates Expo, "made by pirates, for pirates", where pirates all over the world, including some of its most infamous ones, join in for a big treasure hunt to find a lost treasure, this time the treasure belonged to none other than Gold Roger!