Title: Kamen Rider W & Kamen Rider Decade: Movie War 2010Kamen Rider ? Kamen Rider Double & Decade: Movie War 2010 is the name given to the commercial promotion for the December 12, 2009, theatrical releases of the Kamen Rider Decade epilogue film, the Kamen Rider Double prologue/flashback film, and a third film that exists as a crossover between the two and serves as the finale to Decade. Kamen Rider Decade: The Last Story follows the series cliffhanger ending at the climax of the Rider War. The film is billed as the "True Ending" and was originally subtitled Decade vs. All Riders. Kamen Rider Double: Begins Night investigates the origins of Kamen Rider Double as briefly shown in the cold opening of the series' first episode, referred to in the series as the "Begins Night". The film is described as the "True Beginning" and was originally subtitled Episode Zero. The Movie War 2010 is the third and final act of the film, a convergence of the two films that brings the casts and characters of Decade and Double to finish the fight with Super Shocker together.