Watch the full trailer for the One Piece Stampede anime . It premieres on August 9th, celebrating the anime's 20th anniversary. Official Website
Fuji TV describes the synopsis of the film:
"The world's greatest pirate expo, by pirates, for pirates – the Pirate Festival. Luffy and the rest of the Straw Hat crew receive an invitation from their host, Buena Festa, known as the master of festivities. Upon arriving, they find the place packed with glamorous pavilions and numerous pirates, including those of the Worst Generation. The place is electric."