すべてのはじまり2009

自身の不甲斐なさがもとで、ツクヨミに事故を起こさせてしまったと思ったゲイツは、“仮面ライダーゲイツリバイブ”へと変身。 本気でジオウを倒すことを決意する。 一方、ソウゴとゲイツの激突を危惧した黒ウォズはそれを防ぐため、ウールに接近。 一計を案じる。

Geiz, who believed that Tsukuyomi caused that accident in the past because of him, decides to renew his confidence in destroying Kamen Rider Zi-O by transforming into GeizRevive! Meanwhile, Black Woz, who is growing concerned with the increasing confrontation between Sougo and Geiz, approaches Heure for assistance. They seem to be working together in order to devise some sort of plan to prevent it from happening again...