- All Just a Dream: OOO's fight with Shocker is ultimately revealed to be but a dream of Eiji's. Understandable, since Let's Go Kamen Riders was a Non-Serial Movie to OOO.
- Evil Knockoff: Using OOO's data, Shocker creates the Shocker OOO.
- Sequel: To the film OOO, Den-O, All Riders: Let's Go Kamen Riders. This story has OOO fighting against Shocker again, who have recreated the Shocker Greeed from that film.
Literature / SIC Hero Saga Kamen Rider OOO Edition OOZ