Now, we won’t go too far down the rabbit hole of Rey’s parents and whether or not J.J. Abrams will retcon what Rian Johnson did, but it does seem like J.J. had someone else in mind than junk traders.
If his initial plan was some sort of Kenobi lineage, he could return to that by just making Kylo Ren’s revelation a lie.
All that said, another aspect to the lightsaber vision in The Force Awakens is that it acted as kindling to the ‘Rey is Obi-Wan Kenobi’s granddaughter’ theory, one of the more prominent theories about Rey’s parentage before Episode VIII.