Movie War Mega Max featured the first seven Kamen Riders (Kamen Rider 1, 2, V3, Riderman, X, Amazon, and Stronger) to commemorate the franchise's 40th anniversary. Trailers for the film shown during airings of Fourze also showed the return of Kamen Rider Double as well as a new form for Kamen Rider OOO. Unlike previous Movie War films, where they were divided into 3 segments, Movie War Mega Max is divided into 5 parts. Like previous Movie War films the secondary Kamen Rider of Kamen Rider Fourze, Kamen Rider Meteor, made his debut in the film.
| Directing | Koichi Sakamoto | Director |
| Writing | Yasuko Kobayashi | Screenplay |
| Crew | Seiji Takaiwa | Stunts |
| Crew | Eitoku | Stunts |
| Crew | Jun Watanabe | Stunts |
| Crew | Sanae Hitomi | Stunts |
| Crew | Satoshi Fujita | Stunts |
| Crew | Ryō Yokata | Stunts |
| Crew | Masashi Takada | Stunts |
| Crew | Jiro Okamoto | Stunts |
| Sound | Shuhei Naruse | Music |
| Sound | Kotaro Nakagawa | Music |
| Editing | Hiroshi Sunaga | Editor |
| Sound | Shō Ayanokōji | Theme Song Performance |
| Sound | Marty Friedman | Theme Song Performance |
| Writing | Kazuki Nakashima | Writer |
| Camera | Koji Kurata | Director of Photography |
