Earlier today, Funimation announced that they will partner with Toei Animation to give One Piece: Stampede a theatrical run in North America. The film will hit theaters in the United States and Canada at an unspecified future date.
One Piece: Stampede opened in Japan on August 9.
Takashi Otsuka (One Piece Episode of East Blue: Luffy to 4-nin no Nakama no Daibōken, Precure All Stars DX2: Kibō no Hikari—Rainbow Jewel o Mamore!) directed the film at Toei Animation, with Masayuki Sato (One Piece Film Gold, HappinessCharge PreCure!) providing character designs. The team of Atsuhiro Tomioka and Takashi Otsuka served as screenwriters, while series creator Eiichiro Oda worked as a Creative Supervisor for the project.
Funimation describes the feature as:
[P]lace[d] outside the canon of the “One Piece” TV series. Monkey D. Luffy and his Straw Hat pirate crew are invited to a massive Pirate Festival that brings many of the most iconic characters from throughout the franchise to participate in competition with the Straw Hats to find Roger’s treasure. It also pits the Straw Hats against a new enemy named Bullet, a former member of Roger’s crew.
Source: Funimation (Press Release)