One Piece Film: Strong World

During a showing of the Episode of the Island of Perpetual Winter, a teaser for the tenth movie was revealed, which was released on December 12, 2009 (though was originally meant for a spring release).

What is known about the film is that it is an original story written by Eiichiro Oda himself in honor of One Piece's Tenth Anniversary (In previous films he only supplied character designs and approved story ideas. For this one Toei personally asked if he would write the story). The movie is apparently set after the Thriller Bark Arc, as Brook is shown alongside the other Straw Hats, making this his first movie appearance. Sengoku, Garp, Shanks and Whitebeard are revealed to be in the film as well.

The movie seems to focus on Nami, who looks to have gotten herself into a situation and possibly forced to leave the Straw Hats once again to join the enemy. In this case, a figure named Kinjishi who for 22 years ago controlled the largest pirate fleet and in the movie have gathered 5000 new men. The movie also seem to deal with a "Crystal" ship log. A teaser trailer was revealed at the Tokyo Animation Fair 2009, revealing the title of the movie as "Strong World".

Recently a new trailer for the movie has been showing giving more insight to the movie: the film shows the Straw Hats stumbling on some flying islands that is used as a pirate ship which are apparently ruled over by Kinjishi. The lands are inhabited by a many strange and exotic animals that one of Kinjishi´s men has mutated with some sort of elixir but they're under Kinjishi's control. What more the Marines are trying to stop Kinjishi because he is trying to destroy the world they have build and make pirates rule it forever. The Straw Hats get involved in the conflict, especially after Shiki kidnaps Nami, and try to stop whatever he has planned.

The first 1.5 million japanese moviegoers who see One Piece Film Strong World will receive the "0th volume" (One Piece: Kan-Zero) of the manga. In the upcoming "One Piece Kan-Zero" bonus gift will depict the world of One Piece from 20 years ago. It's said this volume is directly related to the plot of the movie — in particular, the Pirate King Gol D. Roger versus the legendary pirate "Gold Lion" Shiki.

Synopsis
East Blue in crisis? The news hits the Straw Hat Crew along their journey. With their hometowns facing a crisis, Luffy and his friends put their adventures on hold and search for a way back to East Blue, when suddenly a mysterious flying pirate ship appears out of the sky. The man riding that ship is none other than the infamous Devil Fruit user, Gold Lion Shiki, the same legendary pirate who managed to escape the great undersea prison Impel Down, and stood among such famous pirates as the Pirate King Gol D. Roger and Whitebeard. After abducting Nami, Shiki sends Luffy and his crew hurdling down to earth. Separated, the crew finds themselves placed in a battle of survival with terrifying beasts on a flying archipelago. Meanwhile, with tears in her eyes, Nami begs Shiki to let her join his crew.

Creatures that evolved on their own respective islands? What happens to the Straw Hat pirates? What is Shiki after? An adventure where the Straw Hats place their very lives on the line begins now!

Pre Movie Arc: Little East Blue
Episodes 426-429

A special anime-only arc (consisting of four episodes) was made which will follow into the movie afterwards. The arc begins twenty years in the past when Shiki managed to bust his way out of Impel Down by cutting off his legs. Then he uses his Devil Fruit power to escape into the air. The story then moves to present day, a submarine carrying a mariachi style band of pirates known as the Amigo Pirates makes it way through the ocean. The leaders of the bunch, Largo and his brother Colt, are offered to join Shiki's assembly. However they must fulfill a certain condition.

Meanwhile the Straw Hats are fishing, trying to refill their rations when they're attacked by a large horned beetle. After a brief skirmish, the beetle takes Luffy, along with Ussop, Sanji and Zoro, to a nearby island. There they meet its owner, Yoko, who dubs the beetle "Boss" as well as shows a disdain for Luffy as he is a pirate. Soon the rest of the island's residents make themselves known, revealing that they actually know of the Straw Hats and their exploits. They lead them back their village, mentioning Yoko's past in the process (her father was a marine who helped protect the village; but was killed while defending it from pirates, hence her hatred of them). Once the group reaches their destination, they find the whole town modeled after East Blue, even called "Little East Blue". Ussop soon calls Nami on the Den Den Mushi, stating that the villagers wish to meet her. She obliges, hopping on her Sky Waver toward the island. Meanwhile the Amigo Pirates are closing in on the island as well, aiming to capture Boss as he is a runaway from Shiki's hideout.

Luffy, Zoro, Usopp and Sanji explore around a bit, visiting the replicas of their respective homes as the villagers show them around. All the while Yoko spies on them, continuing to show her disapproval of their presence. Nami meanwhile meets a few fans of hers, all boys, who show her a statue they carved using her bounty poster as reference (as well as also intentionally making her naked). Nami is not amused by the shrine. Eventually the town throws a buffet for the Straw Hats, to which Luffy stuffs himself silly. However in the midst of the celebration, Colt and the Amigo Pirates appear and crash the party demanding Boss. When the citizens refuse, the Amigos prepare to attack only to be taken down by Zoro, Sanji and Luffy. Just as Luffy is about to finish Colt, Largo suddenly appears and blindsides Luffy, with a net attack he suddenly shoots out of his hands that traps the Straw Hat Captain in a spiked net, which pokes and scratches at him with every movement.

Largo then reveals he eaten the Ami Ami Fruit (Net Net Fruit) and can make different nets out of the matter of anything he eaten, as he had done with Luffy's net after eating a hammer. Zoro and Sanji attempt to attack Largo themselves but he creates different nets for them and captures them as well before stringing all three Straw Hats up to a tree. Largo and Colt once again demand Boss or otherwise they'd exterminate the town. Boss suddenly apppears and, not wanting Little East Blue to be destroyed, agrees to give himself up. Just as he is about to fly into a cage Largo made for him, Luffy manages to tear open his net and punches him to the ground, angrily reminding him of their planned rematch. It is at this point that Boss begins his molting process. Once done he burns the nets of Luffy, Sanji and Zoro who, once free, ready themselves for a final battle against the Amigos.

Luffy activates Gear Second and with some help from Sanji, punches Largo deep into the forest. He then chases him through the forest to the shore where they continue their fight, while Nami, Zoro, Sanji, Usopp and the citizens of Little East Blue along with Boss take care of Colt and his men. Back at the shore, Largo uses his Ami Ami no Mi powers to turn his body into a net and captures Luffy inside himself. Luffy, however, uses Hone Fuusen to tear the net, and then uses Gomu Gomu no Gigant Pistol to defeat him; slamming him into his own submarine and deep into the water. In the aftermath, Luffy and Boss have their rematch till both tired themselves out ending the battle in a tie. Yoko, with some help from Nami, comes to learn that not all pirates are bad after seeing the Straw Hats willingly defend Boss and Little East Blue. Largo, Colt and the Amigo Pirates are captured by the citizens of Little East Blue and put into a cage that Franky had originally made for Boss. With that the Straw Hats sail on with Luffy promising Boss and Yoko that he'll return someday. Meanwhile, Shiki is informed on the Amigo Pirates' failure to capture Boss (unaware of the Straw Hats' interference), but he casually explains that "one escapee doesn't affect the execution of my plan at all" as he view monitors of various animals with glowing eyes. Shiki then announces that the time to set his plan into action has begun.

Trivia

 * Oda had designed the Straw Hat's costumes. So far, they have been seen with three designs: formal suits, adventure suits and onboard suits.
 * This is the first movie for One Piece that is intended to be canon rather than filler.