Heisei Rider vs. Shwa Rider Kamen Rider Taisen feat. Super Sentai feat. , Heisei Raid Tai Shwa Raid Kamen Raid Taisen Fcharingu Sp Sentai? is a Japanese film featuring a crossover within the Kamen Rider Series, as well as the Super Sentai series. Scheduled for release on March 29, 2014, characters from all of the Kamen Rider Series, as far back as 1971s Kamen Rider up through the currently airing series Kamen Rider Gaim will appear, with many of the original actors reprising their roles, including Kamen Rider s Hiroshi Fujioka. The film serves as a 15th anniversary commemoration of the Heisei period run of the Kamen Rider Series.
The film opens with Zawame City ravaged by a fight between the Heisei Riders and the Shwa Riders, before going back in time to the week before, when workers from the Yggdrasill Corporation are dragged by an unknown force to underground. Upon hearing rumors about it, Kouta Kazuraba investigates the area with his friend Mai Takatsukasa, just to fall into a hole as well and find themselves in an underground, alternate version of the city. The two find a boy called Shu, who has the power to revert things and is certain that he has something important to do, but he does not remember what it is. Kouta and Mai then bring the boy to the surface and Takeshi Hongo appears demanding them to hand him over, when soldiers from the Underground Badan Empire appear to kidnap him as well and Takeshi transforms into Kamen Riderto allow Kouta, Mai, and Shu to escape. Badan then launches an attack on the surface, and Armored Riders Baron, Ryugen, and Zangetsu Shin appear to fight back alongside Kouta, who transforms into Armored Rider Gaim as well to protect his friends. However, Gaim is attacked by Kamen Rider Fifteen, who is also seeking the boy and also possesses a Lockseed that allows him to transform into the Rider Arms of theHeisei Riders, and when Kamen Riders 1, 2, and V3 appear to fight him, Shu uses his powers to escape with Gaim and Mai.Kouta and Mai take Shu to Drupers where they meet Tsukasa Kadoya, and Narutaki appears before them as well, affirming that the fifteen Heisei Riders must join forces to stop the Badan Empire, and before leaving, warns them that asking for the Shwa Riders help is useless as they will refuse to cooperate with them. Tsukasa then departs to gather the other Kamen Riders with Kaito Kumon, while Kouta stays behind to take care of Shu. The first Rider they contact is Shotaro Hidari, who refuses to hear their plea before he finishes his job to search for some lost pets. Leaving Kaito behind to help Shotaro with his errand, Tsukasa contacts Tak
Source: Wikipedia