Harmony Sentai Rider

is a Japanese tokusatsu superhero action short film directed by Koichi Sakamoto and written by Yasuko Kobayashi, marking as a crossover between Super Sentai (featuring Kaizoku Sentai Gokaiger (source material for Power Rangers Megaforce and Super Megaforce), Kamen Rider (featuring Kamen Rider Decade and Kamen Rider Saber), and Harmony Unleashed. Unlike the whole Harmony Unleashed Saga, this is a Japanese-provided production in co-operation with Hasbro's eOne Studios and Hollowfox Entertainment.

The short film commemorates Kamen Rider's 50th Anniversary, Super Sentai's 45th Anniversary, and Harmony Unleashed's 10th Anniversary as it will be a crossover between the Harmony Unleashed Saga, Kamen Rider Decade, Kamen Rider Saber, Kishiryu Sentai Ryusolger, and Kaizoku Sentai Gokaiger.

The film will be released in 2021 in Japanese theatres with an announcement of who's gonna be double-billed with yet to come.

Plot
When Kamen Rider Saber and Ryusol Red was fighting a new set of monsters in Japan, familiar faces that can transform into other past heroes came to assist them. However, a hero from Miami, Florida goes to Japan in order to help them for... anniversary reasons whatsoever.

Cast

 * Sentai Rangers
 * Ryota Ozawa as Captain Marvelous / Gokai Red
 * Hayate Ichinose as Kou / Ryusol Red
 * Kamen Rider
 * Masahiro Inoue as Tsukasa Kadoya / Kamen Rider Decade
 * Shunichiro Naito as Touma Kamiyama / Kamen Rider Saber
 * Harmony Jaeger
 * Yuki Kaji as the voice of Aaron / Harmony Jaeger
 * Drivers
 * Mark Fujita as Decadriver
 * Tomokazu Seki as Mobirates and Ryusolger Equipment
 * Eizo Sakamoto as Seiken Sworddriver
 * Yuichi Nakamura as Jaeger Driver
 * Villains
 * Kotaro Nakamura
 * Takaya Kuroda
 * Hiroyuki Yoshino