The Movie War Series (MOVIE大戦シリーズ Mūbī Taisen Shirīzu) is a recent group of movies that serve as crossovers with two immediate Series installments within the Kamen Rider franchise, having started with W and Decade. They are shown around mid-December. It can be considered the Kamen Rider Series' equivalent to the VS. moviesImage:Icon-crosswiki.png of Super Sentai, which had celebrated its 15th anniversary before the start of the Movie War Series.