The spinoff will focus on Hiiro Kagami (played by Toshiki Seto), also known as Kamen Rider Brave, and will also feature the return of characters from previous Kamen Rider series, most prominently Kamen Rider Ouja (from Kamen Rider Ryuki).
The film features Kamen Rider Ex-Aid, Kamen Rider Ghost, Kamen Rider Drive, Kamen Rider Gaim, and Kamen Rider Wizard teaming up.
In the spinoff, Kamen Rider Sasword (Kamen Rider Kabuto), Kamen Rider Dark Kiva (Kamen Rider Kiva), Kamen Rider Beast (Kamen Rider Wizard), and Kamen Rider Tiger (Kamen Rider Ryuki) have joined forces with Ouja.
Toei revealed on January 21 that the Kamen Rider Ex-Aid television series is receiving a spinoff titled Kamen Rider Brave ~Survive Se Yo!