I'm curious about this theory. These are spoilers, do NOT read if you haven't watched the movie. [spoiler]I think Rey is Luke's kid. And did I hear Han yell ben when he confronted his son? I was under the impression that it was Jacen, not Ben Skywalker. Although Han might have yelled Ren instead. I think Rey is Luke's kid because in the movie, Luke left because he was training someone and they turned to the dark side (his wife according to lore) and it wasn't Ren because Leia said she wishes she had let Luke train him instead of letting him go train with whoever he trained with. Just a thought! Also, could it be possible that snoke (forgot his name) is a clone of the emporer? I hope not, I want a new villain.[/spoiler]