One Piece: Adventure of Nebulandia

A retelling of the Arlong Park arc, with new animation.

The Straw Hats encounter a city in the middle of a whirlpool, called the Ocean's Navel, that is being destroyed by giant monsters. These monsters supposedly protect a treasure capable of granting wishes, but in the process of defeating these guardians, the crew ends up releasing another evil. (aired after Episode 53)

The special will be a completely new work, featuring reanimated scenes from the beginning of the series through when the crew enters the Grand Line. The special is commemorating the manga's 20th anniversary, and will also feature anime versions of the original manga's chapter cover stories as part of the special's ending credits. The staff haven't yet clarified which cover story or stories will be animated. Additionally, the anime will feature a special 20th anniversary commemoration version of the original opening theme song "We Are!".

Informed by the Thief Brothers his ship has been stolen by the Trump Kyoudai (Trump Siblings) who have set up base on Clockwork Island. Monkey D. Luffy, Captain of the Going Merry and aspiring Pirate King works with his crew - Ussop, Zoro, Sanji and Nami to battle their way up Clockwork Island to reclaim their ship.