Activision has revealed that they plan to release DLC for Transformers: Revenge of the Fallen this Summer. The upcoming DLC expansion will add 10 new multiplayer characters as well as new single-player characters on both sides, 3 new multiplayer maps, and an expert difficulty level with new leaderboards. Last but not least - New achievements of course. More details coming to you in this thread when they are available.
See the link below for some screenshots of this pack.