Who are Rey's parents?

I read with interest that there is already buzz surrounding Star Wars episod VIII and where it would be filmed. One of the questions I have seen at many places in the web, were "Who are Rey's parents?" Could it be Luke Skywalker where she was about to passed him his light saber at the end of episod VII? Or would she be a daughter of Princess Leia and Han Solo whom Kylo Ren recognised? However, JJ Abrams director of Star Wars episod VII, have provided a valuable clue that her parents were not in episod VII. The speculation goes on.Could she be related to the lead character of Rogue One - A Star Wars story? Will her identity be revealed before episod VIII be shown?