Tsukasa travels to his home world of the World of Decade, where he discovers the origin of his powers and his true heritage as the leader of Dai-Shocker. The film features all ten of the lead Heisei Kamen Riders, as well as all of the Shōwa period Kamen Riders, leading to a total of 25 Riders.

Serving as the true ending to Kamen Rider Decade and revealing the origins of Kamen Rider W, this movie is split into three parts. In "Kamen Rider Decade: Final Chapter", Tsukasa Kadoya fully embraces his title as the Destroyer of Worlds. In "Kamen Rider W: Begins Night", Shotaro and Philip recount the night on when it all began. Elements of both parts converge in the movie's final part, "Movie War 2010" as our heroes fight the forces of Super Shocker.

Former high school classmates, now adults, hold jealous thoughts, hidden intentions and lust for revenge. Graduates from a high school have held reunions since they graduated 10 years ago. The high school itself is located 2 hours from Tokyo by train and past reunions were held by different teams for different areas. An upcoming reunion is the first time where everyone will gather again.

Prosecutor Kohei Kuryu takes charge of a case with a foreign embassy possessing the key to solve the case. Due to the extraterritoriality involving the case, the investigation has not gone anywhere. A crisis then ensues. Kohei Kuryu and his office attempt to extract the truth behind the wall of the Neustrian Embassy.

An attack takes place on Rainbow Bridge in Odaiba, Tokyo by the fighter helicopter `Gray Ghost`. 2 days earlier, the Gray Ghost was stolen. The perpetrators are followers of Yukihito Tsuge. Yukihito Tsuge planned a coup of Tokyo 13 years earlier. The leader of Special Vehicle Section 2, Keiji Gotoda, sets out to stop the terrorists.

Struggling manga author Satoru Fujinuma is beset by his fear to express himself. However, he has a supernatural ability of being forced to prevent deaths and catastrophes by being sent back in time before the incident occurred, repeating time until the accident is prevented. One day, he gets involved in an accident that has him framed as a murderer. Desperate to save the victim, he sends himself back in time only to find himself as a grade-schooler one month before fellow classmate Kayo Hinazuki went missing. Satoru now embarks on a new quest: to save Kayo and solve the mystery behind her disappearance.

Nobuyuki Sakisaka (Yuta Tamamori) is a salaryman. When he was in middle school student, he read light novel "Fairy Game”. He still has that light novel, because he was so shocked by the ending. One day, Nobuyuki Sakisaka browses the internet and comes across the blog "Rein Tsuri no Kuni.” He learns that the blog writer, Rika Hitomi (Mariya Nishiuchi), also was shocked by the ending in light novel "Fairy Game." Nobuyuki and Rika soon begin to exchange emails. Nobuyuki wants to meet Rika, but she refuses due to her secret.

A single father and judicial clerk named Tsutomu's violent past in organized crime threatens to catch up to him when his daughter is taken hostage.

A series of Internet and cellphone spin-off films associated with the theatrical movie "Kamen Rider Decade: All Riders vs. Dai-Shocker". Thirty of these short films were made, taking place in the "World of Net", with the first aired on July 17, 2009. The series was split up into multiple categories including "Petition!" and "Transform!".

Shuji Mimura works as a broadcast writer. He learns that he doesn't have much time left to live. He decides to concentrate on the future of his beloved family. Shuji Mimura's final plan is to find the best man to marry his wife Ayako.