Scalan15 adds that if your having a problem find the new content, "you need to delete the prior transformers BD Data file, once you delete that and start the disc up it should work."
Update: From Aaron comments, most of the features are not new. As for the new scene, it what takes place after their adventures with Alice and before the The Doctor may or may not torture Sam.
"Sam, Mikaela and Leo are driving away from something (picks up mid-scene, so no idea what's going on). An Mh-53 picks them up, no markings to indicate if Blackout/Grindor (it's fast), drops some sort of hook on them, lifts them airborn to drag away. This leads to the scene we've seen many times with a car rotating in mid-air with Sam holding on for dear life from the passenger door. It goes on to imply they've been flown a long distance to a warehouse where the car is dropped from a height of 50+ feet, crashes thru the glass roof of the building, lands on concrete and immediately settles on the roof of the car, the airbags deploy. Then the scene we've seen several times of a saw blade opening up the car and Starscream overlooking the newly opened insides of the car. Never shows if anyone gets out OK or runs away."