This is thirty minutes of the crew doing nothing but being themselves. No world-ending stakes, no plot machinery, just Luffy wanting meat while Sanji argues and Chopper gets flustered over compliments. If you've watched enough One Piece to love these people, this hits exactly right because it remembers that the show's real engine is watching them exist in a room together.
A short prequel special to One Piece Film: Gold. All nine members of the Straw Hat crew are aboard their ship, working out what they will do once they reach the casino that awaits them. The mix of action, adventure, comedy and fantasy points to a light, playful warm-up that keeps the focus on the crew together before the film's story begins.