TFW2005.com noticed an Amazon listing for a Transformers 3: The Dark of The Moon push-up board book. The listing appears to reveal the official plot of the upcoming sequel. Take a look at the plot description below:

"The Autobots Bumblebee, Ratchet, Ironhide and Sideswipe led by Optimus Prime, are back in action, taking on the evil Decepticons, who are determined to avenge their defeat in 2009's Transformers: Revenge of the Fallen. In this new movie, the Autobots and Decepticons become involved in a perilous space race between the U.S. and Russia, and once again human Sam Witwicky has to come to the aid of his robot friends. There's new characters too, including a new villain in the form of Shockwave, a longtime "Transformers" character who rules Cybertron while the Autobots and Decepticons battle it out on Earth."
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Nothing has been confirmed by the studio at this time and we'll be sure to keep you posted with any and all Transformers 3: The Dark of The Moon updates as soon as we have more information.