"Well, what if they left?" Rodimus says with forced optimism. "Now that they've got their ship fixed...I mean what's...what's the point of them staying here anymore? We've got the forge, Optimus is here, Earth's got nothing worth having, not really...maybe....maybe they left?"

Not that this would be entirely a good thing, but, certainly fighting the Decepticons would be easier on a planet without so many vulnerable indigenous species.