Rian Johnson had some real crazy ideas about who Rey's parents might be
J.J. Abrams left some big narrative holes for his predecessor, Rian Johnson, to fill when he shipped The Force Awakens off to theaters, questions like, “What’s up with Luke?” “Who is Snoke?” and “What’s the deal with Rey’s parents?” And while Johnson found satisfying answers for at least some of those queries—”Snoke who?”, right?—over the course of The Last Jedi, it wasn’t necessarily a simple process.
This is per a podcast interview the director recently gave to /Film, detailing some of the many ideas he apparently had for who Rey might ultimately turn out to be: