[Zabitan]

I've been thinking about all the motifs that had been done on Kamen Rider (insects obviously, cards, yokai, vampires, greek symbols, time travel, etc), and I was trying to think of ones that haven't, and I thought of some.

For starters I don't think there's ever been a plant based Kamen Rider, I also don't think there's been a space themed Kamen Rider but that's because I heard Toei has moratorium on setting Kamen Rider or Super Sentai anywhere besides modern day Japan, I also heard that before Decade they were thinking of doing a water themed Kamen Rider.