Kamen Rider ZI-O has met several Heisei Riders throughout the series, along with introducing new characters. It was recently announced that a previously movie-only Rider would appear in the main series.
Atsushi Arai (荒井敦史) will reprise his role as Michal Minato/Kamen Rider Aqua from the 2011 film Kamen Rider × Kamen Rider Fourze & OOO: Movie War Mega Max. He is scheduled to appear in Kamen Rider ZI-O episodes 44-46 on July 21, July 29, and August 4th.
In the previous film, Michal had to overcome his insecurities to unleash his full potential as Kamen Rider Aqua. Thanks to the help of his 2011 Kamen Rider OOO friends, he became the hero he was meant to be. Michal has now reappeared in 2019.
Regarding the role, Arai commented: “It’s been awhile” and “Are you surprised? I was the most surprised after receiving the offer.” He wondered if children in 2019 would even be familiar with Kamen Rider Aqua.