: Whatever the answer is, I don't think it'll be satisfying. Star Wars already
: suffers from a pretty severe "small world" syndrome, and if
: she's related to a main character it'll be that much smaller, alongside
: asking the obvious questions of how is leaving someone you care about on a
: desert planet barely surviving a good idea.

Luke started out on a desert planet, so Rei had to start out on a desert planet. As impressed as I was with TFA, I think that's all the thought they put into it.