Star Wars Force Awakens Theory

Not much of a theory, more of a guess. But based on the new trailer, I think that Han and Chewie are stealing back the Millennium Falcon. It looks like they are in one of the hallways and the fact he says "We're home.", only feels right if he's talking about the ship they piloted together so many years. So I guess it gets taken from them at some point and they track it down and steal it back. Might be the opening to the movie on the desert planet with the downed star destroyer (tattooine?) and they get chased by that tie fighter. Any thoughts?