- What Could Have Been: Kamen Rider J was initially planned as a sequel to Kamen Rider ZO; however, for various reasons, J was made it's own movie.
- According to an interview with the director, Keita Amemiya, ZO was originally intended to continue into a TV series, much like Kamen Rider ZX, but due to various reasons, those plans never continued. It's possible that what was left of these plans were recycled into the aforementioned Kamen Rider J.
- The Wiki Rule: Covered as part of the Kamen Rider Wiki and as an individual series on the Kamen Rider ZO Wiki.
Trivia / Kamen Rider ZO