User blog comment:CureAlpha/Cosmic Pretty Cure!/@comment-4330746-20120313015738

Space is a good idea, but I don't think many series like to use that because it's been sort of "trademarked" by Sailor Moon. So any new series with a space theme will naturally get compared to Sailor Moon and be called a spin-off of that, so maybe that's why we don't have so many space-themed magical girl animes? =)