[FairyKing]

It's not fully formed, but I have an idea for Kamen Rider Visit, a Rider with forms based on landmarks. The collectables are Sekai Marks, translucent spheres with a globe texture on the outside and an image of the landmark they represent on the inside. I haven't decided on the plot specifics yet, it's either a globetrotting treasure-hunt to find the Sekai Marks and keep them from falling into evil hands, or a rebellion against an evil organization that has isolated Japan from the rest of the world and imposed a new sakoku or "closed country" rule. Maybe one of those plots for the show and the other for the movie?

The globetrotting treasure-hunt idea could also work for a rider based on treasures and artifacts instead of landmarks, basically if Boukenger was a Kamen Rider plot instead of Sentai.