who thinks there is going to be a "Transformers 3"? at the end of "Transformers 2", Megatron & Starscream just fly off into space, so if there isn't going to be a sequel to "T2", then are you telling me Megatron & Starscream just flee & are never heard from again? That's a stupid ending to a VERY GREAT movie series....
As a preemptive measure, Paramount announced a July 4, 2011 release date for a third Transformers film before completion of Revenge of the Fallen. Bay responded, "I said I was taking off a year from Transformers. Paramount made a mistake in dating Transformers 3—they asked me on the phone—I said yes to July 4—but for 2012—whoops! Not 2011! That would mean I would have to start prep in September. No way. My brain needs a break from fighting robots."[174] Like Revenge of the Fallen, Orci refused to guarantee whether he and Kurtzman would return to a sequel, because "we risk getting stale".[175] Orci has mentioned he would like to introduce Unicron "for scale's sake".[52] The co-writer also said focusing on more Triple Changers would be interesting.[176]
Before Transformers was released, producer Tom DeSanto had "a very cool idea" to introduce the Dinobots,[177] while Bay was interested in an aircraft carrier, which was dropped from the first film.[178] Orci claimed they did not incorporate these characters into Revenge of the Fallen because they could not think of a way to justify the Dinobots' choice of form,[97] and were unable to fit in the aircraft carrier.[104] Orci also admitted he was also dismissive of the Dinobots because he does not like dinosaurs ("I recognize I am weird in that department," he said),[179] but he became fonder of them during filming because of their popularity with fans.[180] He added "I couldn't see why a Transformer would feel the need to disguise himself in front of a bunch of lizards. Movie-wise, I mean. Once the general audience is fully on board with the whole thing, maybe Dinobots in the future."[181]
http://en.wikipedia.org/wiki/Transformers_Revenge_of_the_Fallen#Sequel