>>10597827I agree with you on Rock Raiders and its fuzziness as a Space theme (along Life on Mars), but I think the Issue with castle goes as far The first Knight's Kingdom with King Leo and the Bulls. I wonder if they still occupied a "slot" reserved for the Space or Castle theme of that year.
Though in marketing the later themes of each like Fright Knights and Insectoids felt kinda isolate. You didn't seem them interact with each other in promo pictures like Space Police with Ice Planet or Forestmen sneaking into castles.