- Shuichiro Naito as Touma Kamiyama/Kamen Rider Saber
- Takaya Yamaguchi as Rintaro Shindo/Kamen Rider Blades
- Ryo Aoki as Kento Fukamiya/Kamen Rider Espada
- Yuki Ikushima as Ryo Ogami/Kamen Rider Buster
- Eiji Togashi as Ren Akamichi/Kamen Rider Kenzan
- Hiroaki Oka as Tetsuo Daishinji/Kamen Rider Slash
- Tomohiro Ichikawa as Yuri/Kamen Rider Saikou
- Angela Mei as Reika Shindai/Kamen Rider Sabela
- Ken Shonozaki as Ryoga Shindai/Kamen Rider Durendal
- Asuka Kawazu as Mei Sudo
- Rina Chinen as Sophia
- Kiita Komagine as Kaito Goshikida/Zenkaizer
- Shintaro Asanuma as Juran/Zenkai Juran
- Yuki Kaji as Gaon/Zenkai Gaon
- Yume Miyamoto as Magine/Zenkai Magine
- Takuya Sato as Vroon/Zenkai Vroon
- Atsuki Mashiko as Zocks Goldtsuiker/Twokaizer
- Misato Fukuen as Secchan
- Ikue Sakakibara as Yatsude Goshikida
But that's not all, the poster also features other heroes, gathering the heroes from three different eras, Showa, Heisei, and Reiwa! These heroes are: DekaMaster, ShinkenGreen, Ryu Commander, Washi Pink, Kiramai Blue, Kamen Rider Zero-One, Kamen Rider Den-O, Kamen Rider W, Kamen Rider BLACK, Kamen Rider Kuuga, Kamen Rider 1, Akarenger, Tyranno Ranger, GaoRed, MagiRed, BoukenRed, and GokaiRed. It is unknown if some of their actors will reprise their roles for the film.
Celebrating Kamen Rider's 50th anniversary and Super Sentai's 45th anniversary, the film is directed by tokusatsu veteran Ryuta Tasaki (Gamera the Brave, Kamen Rider 555: Paradise Lost), written by Nobuhiro Mouri (Kamen Rider Gaim), is produced by Kikai Sentai Zenkaiger and long time Heisei Kamen Rider producer Shinichiro Shirakura (Kamen Rider Agito, Kamen Rider Den-O). Kamen Rider Saber + Kikai Sentai Zenkaiger: Superhero Senki is set to premiere this July 22nd.