I suspect Finn is also force sensitive, he is going to be a jedi.
In the first act of the movie, in the scene when he freaks out , Kylo seems to sense something strong on him, that shot was interesting, also he managed to hurt Kylo with that light saber.
Rey is the daughter of Luke.
In the scene when she has the dream sequence I think the force talked to her with the saber, The light saber only responded to her, the power of the force in her is inmense.
Also, that flashback of a ship leaving her in jakku.
what do you guys think?