Does anyone else think that if the decepticons had managed to hold out for longer, they could have used Dylan's collection to blend in and retain the 'robots in disguise' gimmick? I think that must have been why he was collecting cars, under the impression they would be needed for his clients at some point. They could have used this tactic to take out the areas surrounding Chicago eventually, with less human resistance than a colossal mechanical worm or a fleet of 'Con Aircraft would muster up. Anyway, this just came to me, like the 'Bayformers point of view' thing. This idea probably goes without saying, but as I recall it remained untouched in the movie.