SPECULATION Rey is Temple Artifact

Ok, so this is my theory on who Rey is and what went down with Luke. There's a lot of room for modification, or small variances, but I think something like this went down. I tried to make it as short as possible, but it's still a bit of a read. Thanks for reading:

At some point after ROTJ Luke begins his training a new Jedi Academy on one of the planets. Obviously, this training isn't just physical training, but also educational, and trying to unlock ancient Jedi secrets of some of the temples.

Somewhere in here Ben Solo is dropped off to be a part of this group. He shows promise, but is somewhat disturbed frequently by visions and temptations from the dark side. Eventually, Ben finds that he's not the only one with these visions and temptations. A handful of other students also have sensed this. Additionally, these other students and Ben have discovered ancient secrets of the dark side and have dabbled in it secretly - unhappy with their slow progress, the dark side is alluring. Ben creates a secret society that will eventually be the "Knights of Ren" that we see based on these secrets.

Unsuspectingly, all of these visions and temptations are a part of Snoke's doing - an effort to discover the true power of the ancient Jedi temples. Beyond just the Knight's of Ren, Snoke has been lurking in the hearts and minds of many of the students. The level of anger, distrust, and rivalry seems to be rising among the students and Luke finds himself disturbed and frustrated. There is a darkness, but Luke cannot figure out the source.

One day an area of one of the temples is unlocked housing a young girl - the students freak out. She is a baby, but quickly displays incredible giftedness with the force. Luke takes her under his wing. This baby causes an even greater stir of jealousy and anger amongst the students. Luke seems to have essentially adopted her. Jealousy rises especially in Ben Solo, who has been the superstar so far.

At some point, Snoke makes himself known to Ben. He plays off the jealousy that has been growing in Ben. He promises him power and leadership if only he will bring the girl to him. But how?! Luke is too powerful and will stop any attempt to take this girl. Snoke promises to make a way.
During a training Rey begins to exhibit incredible ability and power. Some of the students are amazed, but many are angered and begin to feel scared and threatened by her ability. They begin to argue and the argument begins to grow out of control and a fight breaks out and one of them murders another. The fight escalates, it's irrational, but can only be explained by a dark influence. It's pure anarchy. Some trainees are trying to protect the girl, but some want to kill her because she's a "threat" and "evil."

Kylo summons his secret society and takes advantage of this situation. They step in and slaughter the trainees easily since they are the only organized group as the others fight (The last one they kill tried to take a swing at Rey). Luke comes in on the scene and rescues Rey. He pacifies the Knights of Ren, but doesn't have the heart to kill them since there's already enough blood on his hands and he knows them all. Not wanting to stay there anymore and realizing the great evil that has finally revealed himself, Luke flees with Rey.

Luke is depressed and believes himself a failure. Not only was his academy slaughtered, but it was manipulated from the inside. How could he allow the darkness to grow so deeply in his own students hearts? He begins to fear this power...he must stop it at all costs. Luke fears that this darkness may break into even his mind. He contacts one of the few surviving people familiar with Jedi lore, Lor San Tekka, and gives him bare bones information, a small map fragment, and Rey. He demands that he not know where they are going. He also demands that even Lor San Tekka should be wary holding too much information.

Luke goes out in search of the first Jedi temple to discover what Rey was originally intended for and why Snoke wants her so badly. What was so important about this ancient baby? Can she be used for good? Is she destined to be evil?
Summary:

One of the central questions has been, "Why would Luke leave Rey and let all these disasters happen to find the first temple?"

Because Rey is part of the temple puzzle. Unlocking her is what sparked the need for the search of the first Jedi temple. And the key to her memory is only found when Luke discovers her original purpose.

Rey's memories of abandonment are true, but misplaced as her parents hid her away thousands of years ago. Yet, Luke is essentially her adoptive father. Her memories were lost in the "cryofreezing" of the temple. Her time at the temple was short lived and still in a fog, not enough to create lasting memories.

Rey's danger lies in her great power. We are not sure what it she is capable of or what path she was intended to take.

Thoughts?