Principal photography has started on Michael Bay's 'Transformers 4' while new actors join the cast, and we're getting a first look at the new, and revamped Autobots. Comic TJ Miller will star alongside Mark Wahlberg in the upcoming 'Transformers 4.' Which I still think should be simply called 'Trans-4-mers.' According to The Wrap he'll be playing a 'mechanic and longtime friend' of Wahlberg's character. Other new 'Transformers 4' developments come from newly posted photos on MichaelBay.com that reveal what we can expect to see on the big screen when the next installment of 'Transformers' hits theaters, and looks like some of these Autobots got an upgrade. The pics include a look at Optimus Prime as a completely upgraded Western Star truck, and two other new additions: one, a sexy black Bugatti Grand Sport Vitesse worth over 2.4 mil, and the other, a bright green C7 Corvette Stingray. But who are these new Autobots? JoBlo.com claims to know, citing a source who says the Bugatti is named 'Drift' and the Corvette is 'Slingshot.' Now some of you might recall these names from the first generation of 'Transformers' cast of characters with Drift being a former Decepticon named Deadlock who changed sides and Slingshot being an Aerialbot. It's unclear if these will be upgraded versions of the same characters, or a completely different crew. We asked you what you thought o.