Transformers 3 hit the Windy City in a big way today. Lots of photos from the set have popped up all over the web. The highlight of it all has to be the glorious return of the trailer. Optimus Prime has classically been a big rig, and the original Prime of course pulled a trailer (that disappeared at a moment’s notice). The above video, captured by a fan with a phone handy, shows the heroic Autobot leader racing into battle without hesitation.

As for the Chicago set photos… well this might get into spoiler territory, so I’ll leave those after the cut. I must stress that you’ll only see CARS, we don’t know if they’ll become robots or what robots they’ll become.

UPDATE: Here is a video of some of the other cars heading toward the set:

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