Kamen Rider W Forever: A to Z/The Gaia Memories of Fate (仮面ライダーＷ（ダブル） FOREVER AtoZ／運命のガイアメモリ, Kamen Raidā Daburu Fōebā Ē tu Zetto/Unmei no Gaia Memori) is the second film adaptation of the Kamen Rider W television series, directed by Koichi Sakamoto and released in Japanese theaters on August 7, 2010. It was filmed in 3D, making it the first feature length 3D film in the Kamen Rider franchise. The film's main guest star is Mitsuru Matsuoka of the band Sophia, who stars as the film's antagonist Katsumi Daido / Kamen Rider Eternal; other guest stars include Genki Sudo and Aya Sugimoto. Following the tradition of previous Heisei Kamen Rider movies, Kamen Rider W Forever was released as a double-bill with the Super Sentai franchise film Tensou Sentai Goseiger: Epic on the Movie. Additionally, the titular protagonist of Kamen Rider OOO made his first appearance in the film.

Set between episodes 44 and 45 of the series, the film focuses on an invasion organized by the Special Mercenary Force "NEVER" (特殊傭兵部隊NEVER, Tokushu Yōhei Butai Nebā) led by Daido, after they discover Foundation X's T2 (Type 2) Gaia Memories (T2（タイプツー）ガイアメモリ, Tī Tsū (Taipu Tsū) Gaia Memori). Assisted by Interpol investigator Maria S. Cranberry, Shotaro Hidari and Philip's investigation into NEVER leads to unforeseen events and secrets being revealed.