Read: Why I Am Excited for the New Star Wars Movie, Which Is for ChildrenThere's a good deal of mystery surrounding the next installment of Star Wars, and the teaser Disney and Lucasfilm randomly dropped via Instagram today doesn't do much to clear things up.The 15-second teaser does, however, give us a look at some unseen footage: a big-ass army of storm troopers gearing up for some bad guy stuff, another shot of that only-in-the-movie-to-be-a-children's-toy robot, and the promise of a lightsaber fight between Finn (John Boyega) and Kylo Ren (Adam Driver).Episode VII: The Force Awakens picks up about 30 years after what goes down in Return of the Jedi, back when Harrison Ford was still actually kind of young. The newest episode in the saga, directed by JJ Abrams, will hit theaters on December 18.