The Super Hero Taisen Series (スーパーヒーロー大戦シリーズ, Supā Hīrō Taisen Shirīzu, Super Hero War Series) is a group of movies that served as crossovers between Toei Company's superhero productions from 2012 until 2017. In the run-up to the first Super Hero Taisen, producer Shinichiro Shirakura said he would like to make this type of movie the norm for spring films. Since their beginning, the franchise releases a film, at the very most, two weeks after their magical girl counterpart Pretty Cure All Stars.
The Spring Vacation Combining Special Series (春休み合体スペシャルシリーズ, Haruyasumi Gattai Supesharu Shirīzu) were a special TV crossover events that air in the spring. They acted as both a special team-up adventure of the current Super Sentai and Kamen Rider series as well as a prequel/sequel/tie-in for an upcoming Super Hero Taisen film.