My theory is that Rey is the new Chosen One of the Force, based on several premises.
1.
I think the prophecy of the Chosen One is fluid and not concrete. There isn't supposed to be "the" Chosen One for all time, but "a" Chosen One will rise from time to time to bring balance to the Force. Obi-Wan relented this fact because he thought Anakin was supposed to do this, and indeed he did from a certain point of view (he destroyed not only the Jedi but the Sith as well). And yet, for those of you who watch the TV show Rebels, there is a scene in which Obi-Wan and an aged Darth Maul have one final confrontation in which they oddly make peace with each other (albeit as Darth Maul is dying).
Check it out. Maul concludes that Obi-Wan is hiding on Tatooine in order to protect somebody. As Maul dies, he asks "tell me, is it the Chosen One?" to which Obi-Wan responds "he is" and in Maul's dying breath "he will avenge
us."
This is huge. Maul usage of
inclusive language here suggests that he's moved beyond the Jedi-Sith dichotomy and seeks to transcend it (in fact
in a scene from an earlier episode Maul harbors a grudge against the Sith and wants to destroy them for ruining his life). This doesn't mean Maul has suddenly regained a moral compass, but rather he sees the Force for what it truly is: the means, not the ends. Point is, when it was clear Anakin's status as the Chosen One faded, it passed to Luke. And, as we learned in The Last Jedi, Luke's self-imposed exile brought about the conditions for a new Chosen One to emerge... and that the mantle has now passed on to Rey!
2. Consider the fact that Anakin did not have any parents. He had a mother sure, but his conception was by the Force. I think it's possible that Rey too could be parentless, which explains why during her cave vision that she saw nobody - only her own reflection - when she was seeking out her true identity. I think what the Force was trying to tell her is that she may have had "parents" in the same way Anakin did, but that she was conceived by the Force. The added imagery of an infinite mirror reflection kind of points to this as well... for if the Force is eternal, then in some ways so is she.
3. Also consider how talented Rey became in the Force without any training. Insane piloting skills? Jedi Mind trick? Beating Kylo Ren in a duel? Becoming engrossed in a Force vision by simply touching the Skywalker Lightsaber? Really? Her inherent ability to wield the Force intuitively is suggestive of her unique connection to it... as the Chosen One.
4. The general theme of the new-EU and the films seems to be trending towards the Gray Force. Perhaps this is what the Chosen One was truly meant to embody from all along - somebody who could wield both the Dark and the Light without becoming a slave to the will of either (as a Sith/Jedi), for this would be true balance, no? If this is indeed the concept that Disney wants to push, then I think Rey will eventually complete her journey (as the Chosen One) in such a way.
What do you guys think!?