As the year 2011 marks the 40th anniversary of the Kamen Rider Series, a film commemorating the event has been scheduled for release in the spring of 2011. The film will primarily feature Kamen Rider OOO and Kamen Rider Den-O, as well as feature the other protagonists of the various television series and films of the Kamen Rider Series. The film is currently referred to as the "40th Anniversary Commemoration Movie for the Birth of Kamen Rider" (仮面ライダー生誕40周年記念映画,Kamen Raidā Tanjō Yonjusshūnen Kinen Eiga?). A working title for the film is OOO, Den-O, All Riders: Let's Go, Kamen Rider(オーズ・電王・オールライダー レッツゴー仮面ライダー,Ōzu Den'ō Ōru Raidā: Rettsu Gō Kamen Raidā?).