One Piece: Episode of Skypiea (2018)

One day, a giant ship falls onto the Straw Hats from the sky. After a narrow escape, and while they are still in shock, a map to the “Sky Island” is carried to them by the wind. While researching for the way there, they meet another pirate and learn that he is a descendant of an infamous Sky Island explorer who was even depicted in a picture book “Noland The Liar” four centuries ago. However, Noland was possibly not a liar after all and might actually have gone to the Sky Island.

Unfortunately the movie One Piece: Episode of Skypiea is not yet available on HBO Max.