So this is my first post. So take it easy.
I have now seen Star Wars Episode 7 for the umpteenth time.
I couldn't help but think, maybe somewhere between episode 6 ans 7 there has been a past encounter between Rey and Kylo Ren / Ben Solo.
There was a build up of things.
Firstly when he found out that BB-8 and Finn was accompanied by a girl - Rey.
Secondly was the first meeting between the two in the forest. Then the scene when Ren tried using the force, to get Rey to confess about the map to the whereabouts of Luke Skywalker.
Kylo Ren says to Supreme Leader Stoke that this girl (Rey) has ways with the force, but hasn't been trained yet or some where along the lines of that.
This is where my theory kicks in. Rey was left on Jakku when she was a child. Only to remember that her parents left her on Jakku. But what if she was one of the younglings in training to become a Jedi by none other than Luke Skywalker, before/whilst Ben Solo turned to the dark side and became Kylo Ren and killed some of the younglings. From the events of that it forced Luke's hand to disperse any surviving Jedi Students and then disappear.
I also think this could be true, for the fact of Rey's knowledge of what happened with the rebellion and about Luke could've been through stories told when being younger whilst in training.
Also with the subtitle being 'the force awakens'
Suggests it refers to Rey, as she was a jedi youngling, that had been learning the foundations of the force when she was younger. (Also her skills in wielding a lightsaber was awesome if I must say). With her not being in touch with the force for so many years, meant her connection to the force became dormant and only when being in that scenario did it waken the force within her. Again I go back to the conversation Ren had with Stoke about Rey's encounter with the force as she fronted Kylo Ren being afraid he'll come up short to Darth Vader.
I may have rambled on abit but let me know what you think. Leave your comments.