Ginkgo Bear:
I'd say this has been a popular motif for many years and will continue to be popular. The trick is finding that unique hook to grab people with!
The intro which I had in mind comes from a short story by Alastair Reynolds. Sadly, he never expanded on it, but it works perfectly for what I have in mind.
To all who are interested in playing: who are your favourite sci-fi authors? Prepping a game for Asimov fans would be different than prepping one for Clarke fans.