[Starman]

You PLAY UP the space travel! Go from planet to planet, maybe like a wild west bounty hunter on their horse-just replace the horse with a motorcycle. Or maybe a robot horse?

Whatever, my point is: have each part of episodes (since Kamen Rider episodes seem to be two-parters for the most part) be about the rider going from planet to planet to stop whatever criminal is causing havoc. Maybe their gimmick device for the series is based on constellations that give him different forms/weapons/augmentations to his suit.

Sorry if this doesn't help, I don't know what Battle Spirits Zero is