A new trailer for Dark of the Moon Optimus Prime has been released. Prime Toys have released their own unofficial version of the trailer which transforms into the circular weapons rack from the opening battle at Chernobyl in Transformers Dark of the Moon. This version can mount the numerous accessories of a Leader Class Revenge of the Fallen / Dark of the Moon Optimus Prime on the central ring, including the Jetwing pack at the top. Please remember though this one is not an officially licensed product from Hasbro or Takara-Tomy.
If you are interested, the trailer is currently listed on several eBay auctions, such as this one where the pictures are taken from.