If you loved One Piece: Dream Soccer King!, try One Piece Film: Strong World
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Munehisa Sakai, and they both carry the playful mood tag, and they sit in Animation / Fantasy territory. If that's the register that drew you to One Piece: Dream Soccer King!, the second film will land in a comparable space — through a different lens.
playful
What One Piece Film: Strong World is
Pirates of the Caribbean if directed by Hayao Miyazaki. The Straw Hat crew clashes with the Golden Lion, who kidnaps Nami for her weather skills. Luffy and company then face the island's bizarre, evolved creatures to rescue her. It's a vivid, buoyant adventure for One Piece fans.

