A key moment in the trailer will be Finn uncovering a green lightsaber in a cave while Rose and Rey look on, with Rey apparently being disturbed by the weapon. Rose's voice-over narration meanwhile remarks, "I know why the weapon came to you", noting how allured by the saber Finn is (implying he is a Jedi in the waiting), while Rey is repulsed by it (unsurprising given that her presumed parents, Leia and Solo, are not Jedi). If nothing else, it should do a pretty firm job of establishing Finn as this movie's equivalent of Luke Skywalker, a hero sure to grow over the course of the new trilogy.