Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie War Core (劇場版 仮面ライダー×仮面ライダー オーズ&ダブル feat.スカル MOVIE大戦CORE, Gekijōban Kamen Raidā × Kamen Raidā Ōzu Ando Daburu Fīcharingu Sukaru Mūbī Taisen Koa) is a 2010 tokusatsu superhero crossover film in the Kamen Rider franchise that features the casts of Kamen Rider W and Kamen Rider OOO. It was originally announced in a teaser at the end of the film Kamen Rider W Forever: A to Z/The Gaia Memories of Fate and was released in Japan on December 18, 2010.