Yesterday Transformers 4 production returned to M-52 outside of Adrian, MI where most of the vehicle cast was spotted. On Location Vacations has posted pictures of Optimus Prime, Bumblebee (2014 Camaro), Corvette Stingray, Bugatti Vitesse, Lamborghini Aventador, and the Freightliner Argosy in some holding area for the vehicles. Videos filmed along M-52 showed the Argosy either following or chasing Prime but no telling what part the area has for the movie.