又名:OOO, Den-O, All Riders: Let's Go Kamen Riders / OOO, Den-O, All Riders: Let's Go Masked Riders / OOO·电王·全体超人 Let's Go 幪面超人 / OOO·电王·全体超人 Let's Go 蒙面超人
Plot Summary:Eiji and Ankh team up with Kotarou and Momotaros as they travel back in time to stop the Imagin. But Ankh's desire to obtain Core Medals while in the past sets off a chain of events that alters the history of the Riders and the world.