Yahoo! was broke the new of two new cars which will be used in Transformers 4. The vehicles were photographed on the border of Arizona and Utah were the 2013 Bugatti Veyron Grand Sport Vitesse, a $2.5 million dollar car, as well as a 2014 C7 Corvette Stingray concept. It has been confirmed that these cars are indeed Autobots with Bay's official website though their names have not been given at this time.
Hollywood reporter has announced that actor T.J. Miller has signed onto Transformers 4 to play the best friend of Mark Wahlberg's character's. T.J's character will be a mechanic.
Finally a photo was posted on Instagram which has shown a new truck mode for Optimus Prime. Michael Bay posted that the truck is "completely upgraded, custom-built Optimus Prime from Western Star (a subsidiary of Daimler Trucks North America)."