Speculate no more, Transformers fans. USA Today and Yahoo Movies! have the official list of Decepticons and Autobots that will be appearing in Transformers: Revenge of the Fallen, along with a few new photos. (Sadly, the photos are of iffy quality; they're practically screencaps.) Still a mystery is whether or not Megatron will appear -- and how he'll fit into the chaos.

First up, the Autobots, starting with the obvious:

Optimus Prime, whose alternate form is a Peterbilt truck.

the weapons specialist, who transforms into a GMC Topkick.

Ratchet the medic, and a Hummer H2.

, who will now be a 2010 Chevorlet Camaro. (This is the only Transformer I ever owned, by the way)

Arcee, the female Autobot, who will be Megan Fox's pink motorcycle. She was actualy supposed to be in the first movie, but Alex Kurtzman and Roberto Orci felt "we needed to win the audience over before asking for that suspension of disbelief: a feminine alien robot."

Jolt, originally a Decepticon, but in this he's a good guy. He'll be switching into a Chevrolet Volt plug-in hybrid.

Jetfire, an older Decepticon who switches sides, and transforms into a SR71 Blackbird jet. According to Michael Bay: "He's old, craggy, forgetful ... doesn't work very well. Can't transform very well, because he's very geriatric. They get stuck with him a lot. He knows the plan of the bad guys, but he forgets all the good parts of the plan."

Skid and Mudflap
, a.k.a. "The Twins" a.k.a. Chevrolet Beat and Trax concept cars."Some of the junior Transformers are just dumb. But it's great for kids because they're like the Little Engine That Could. They're (screw)-ups, but they get really heroic at the end," says Bay.

Sideswipe, who was a bright red Lamborghini in the original will now be a GM silver Corvette Stingray concept car.

Go below the jump for the Decepticons
categories Movies, Cinematical