In the upcoming film, Aruto lost his powers to transform into Kamen Rider Zero-One thanks to the appearance of Another Zero-One. Using the MetsubouJinrai ForceRiser and the Rising Hopper Progrise Key, Aruto transforms into Kamen Rider 001. How did he appear in Zero-One's world? That is for us to find as Kamen Rider Reiwa The First Generation is set a for December 21st release.
[Source: Natalie]