[Barricade64]

I'd want to adapt either Kabuto, Double, or OOO. Any of those 3 series have great marketing potential. I really only have a story idea for Kabuto at the moment:

-Not going to make up a list of names, but I think most of the Rider names would stay the same, though some would change (maybe call TheBee Wasp, and Sasword Swordpion)
-The basic situation is the same, a meteor crashed into Earth seven years ago unleashing a swarm of aliens who can hide amongst us. Let's add a small change here and say they can change into anything, not just humans. Not long after a special task force was commissioned by the government named ZECT to track down the aliens.
-Our main character will actually be Kagami/Gatack (not with those names necessarily), a recent recruit to ZECT who's chosen by one of the newly created Zecter's built to fight the worm. Right after he receives his ZECT HQ is ambushed by the aliens and the Zecter's scatter over the city/country/world as a self-defense program. Kagami now must fight the aliens as well as track down the other Zecter's, and if they have partnered with someone try and recruit them.
-Kabuto will be a mysterious Rider who's identity won't be known right away. He refuses to join ZECT (other Riders will as well) but fights the aliens still, mostly on his own terms.

I do have marketing/naming ideas for Double and OOO. For Double just keep everything the same, no real need to change names IMO. For OOO, only name the Combos and give them names based on the theme of the combo. TaToBa could be Base/Basic Combo, GataKiriBa could be Insect Combo, PuToTyra Dino Combo, etc. The medals will just be referred to by their color (red medals, blue medals). Not sure what OOO or Birth would be called, but I like the ideas presented of Birth being called Cell presented earlier in the thread. Maybe for OOO something around the number 3, maybe Kamen Rider Tri?