Kamen Rider × Kamen Rider Double & Decade: MOVIE War 2010 (仮面ライダー×仮面ライダー ダブル＆ディケイド MOVIE大戦2010, Kamen Raidā × Kamen Raidā Daburu Ando Dikeido: Mūbī Taisen Nisen-Jū) also credited as W & Decade: Film Edition (劇場版 「W＆ディケイド」, Gekijōban Daburu And Dikeido) is a Japanese superhero Tokusatsu crossover Winter Film between Kamen Rider W and Kamen Rider Decade, serving as the first ever Movie War. Kamen Rider Accel makes an early-bird appearance ahead of his in-series debut. The movie's catchphrase is "The true ending. The true beginning." (本当の終わり。本当の始まり。, Hontō no owari. Hontō no hajimari.)