The film will introduce Kamen Rider Blood, whose secret identity is Touto's new governor (played by Masanobu Katsumura) and will transform with the help of Cross-Z's Great Cross-Z Dragon. As previously reported, Fuji Takahashi (Lost in Translation) will play Seito's new governor and former SKE48 & Nogizaka46 member Rena Matsui will play Hokuto's new governor. These new governors were also astronauts who went to Mars and are connected to a huge mystery surrounding Kamen Rider Build.
Kamen Rider Build the Movie: Be The One premiered last August 4th in Japan.