I guess a totally-space series could happen, but I don't see it as a real possibility. At least, not one that convincingly takes place on alien-looking planets. Sentai's production demands require that they use a handful of regular urban locations and previously-erected soundstages.

I suppose we could have one where all civilizations in the galaxy look like contemporary Tokyo... but I think a ton of people would complain about that, too. :lol

I guess it can be done as well as there is a certainty amongst Toei and Bandai, TV Asahi, and other sponsors, etc. that good merch and a convincing narrative can come out of this idea to ultimately print money.

They could just go look for a rock quarry to reuse over and over again. If Doctor Who can do it...

Oh, they already have a goddamn rock quarry. Or at least they did from 1990 to 1995 when six straight seasons had dozens of fights in the same rock quarry.