the author has revealed that regardless of the reception of his stories, he will continue the series, since he has expressed interest in trying to. He also has some ideas about any future themed Kamen Rider series. For example: He wanted to do a Basketball inspired Kamen Rider after a Skateboarding one.
Each Kamen Rider season of his work has different themes:
Memory focuses on the concept of photography, the sheer fact of memories, and the horror tone
Honor is more akin to law enforcement, even in a Zombie apocalypse.
900's entire focus is skateboarding
Gold Rush explains about the entire concept of money and
Tranquility is largely inspired by
Oathkeeper's entire setting is about fantasy, knights and
Out of the 8 series he did, 3 have female protagonists (Memory, Grace and Tranquility) where as the other five have