Sounds good. Maybe the OOO OVA series should talk about the original OOO's past and later when Eiji finally faces him. New Greeeds will be born & the old ones return.

Fourze: It can talk about the newest members of the KR Club. A new version of Fourze is made and a zodiarts rider is born. Including a new threat - the Olympus Twelve & the Titans (planets).

Wizard: A remake of Wizard.

Gaim: Take place after the Gaim series. Gaim & Baron feel like Date Masamune & Sanada Yukimura. A new rivalry like Tokugawa Ieyasu & Ishida Mitsunari will be next.

Drive: In the future, Eiji lives his life as a race car driver on the track. But there is a new enemy unlike the Roidmudes. His backup are riders that use aerial & aquatic vehicles. Chase is also revived.

Kamen Rider G. But it has to be Trigger that works on it.