Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max (仮面ライダー×仮面ライダー　フォーゼ＆オーズ MOVIE大戦 MEGAメガ MAXマックス, Kamen Raidā × Kamen Raidā Fōze ando Ōzu: Mūbī Taisen Mega Makkusu) is a Japanese superhero Tokusatsu crossover Winter Film between Kamen Rider OOO and Kamen Rider Fourze, and is the third Movie War. Serving to commemorate the franchise's fortieth anniversary, the film features supporting roles from Double and the first seven Kamen Riders, while Kamen Rider Meteor makes an early-bird appearance ahead of his in-series debut. The catchphrase for the movie is "In Winter 2011, Movie War Will Evolve" (2011年冬、MOVIE大戦が〈進化〉する, Nisenjūichinen Fuyu, Mūbī Taisen ga Shinka Suru) and "This Winter, the Greatest Excitement, will cooooome-!" (この冬、最大の興奮、キターー！, Kono Fuyu, Saidai no Kōfun, Kitaā-!).