It's September 2018, and a group of high school students are more than ever excited to pursue their dreams. Sougo Tokiwa wants to become a desirable king, and Keito "Geiz" Myokoin works tirelessly to become the true judo champion while trying to impress his crush, Alpina Tsukuyomi. However, one day Geiz suffers a career-ending injury during a judo match in a judo tournament, forcing him to give up his dream of become a judo champion. While still grieving, he was met by a mysterious man, who wanted to give Geiz a Ridewatch and a Driver. "My name is Woz, I came here to guide you to become a savior. If not, Sougo Tokiwa will become the worst and evillest demon king." Meanwhile, a new transfer student leads him to nothing but one grand conspiracy.
Sougo Tokiwa who always dreamed of becoming a king encounters a mysterious girl who came from the future and warns him that he would become the king of all time, Kamen Rider Zi-O, who destined to rule the world.
The Kamen Rider Club discovers that the Dai-Zangyack fleet is moving towards Earth, led by Captain Marvelous as their Great Emperor. With many revived Super Sentai villains under his command, Captain Marvelous plans to obtain the Great Power of the Kamen Riders which is said to be "Ultimate Treasure in the Universe". Meanwhile, Tsukasa Kadoya becomes the Great Leader of Dai-Shocker once again and recruits past enemies of the Kamen Riders to take down the Super Sentai teams.
Real estate company employee Komachi and steelworks heir Kodama are both train aficionados. Their hobby proves useful for their burgeoning careers, but their romantic fortunes do not go as smoothly. Will the awkward Kodama and the indecisive Komachi find the loves of their lives?
Tracking a mysterious man leaping through the night air of Tokyo, Ryotaro and the Imagins find themselves in November 2008, where the DenLiner is stolen by none other than Kaitou Daiki, Kamen Rider Diend! As Daiki tracks his past self, he faces off with Time Police officer Reiji Kurosaki, aka Kamen Rider G Den-O! Just what is the connection these two men share and who will prevail when the trigger is pulled?!
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.
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.
Styled as a "Choose Your Own Adventure" story. The viewer's choices throughout the DVD affect how Decade and Diend's fight against Dai-Shocker's Televi Bae-Kun plays out, as well as Yusuke Onodera's completion of the Decade Bazooka weapon from a punch out sheet in the back of a Televi-Kun magazine.
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!".
Under the impression that they saved the World of Den-O, Tsukasa Kadoya (Kamen Rider Decade) and company begin their journey to the World of Kabuto when they are halted by Sieg who presents them a manuscript that detailed the legendary Oni Conquest with Momotaros' image on it. As this occurred, the Tarōs mysteriously vanish from the DenLiner as they are about to help Kotaro Nogami (Kamen Rider New Den‑O) out with the true threat to their world.