orci also said that although the film will stand alon it will leave an opening for the third ala starscream in the first one.

 

HE TELL US
no really, he did

 

Someone or something has pissed him off, We'll find out sooner or later

 

Yea, i dont mind being left on a cliffhanger becuase its what makes the trilogy come together imo. to me a trilogy is supposed to be 3 movies that form one, kind of how commercials pop in during tv shows right at the climax, thats how i see the time between movies like reloaded and revolutions. the time between sucks but once you see the next movie it all comes together and just makes for a better movie imo. Harry potter is the only series of movies that I've felt worked as being contained.

leaving on a note that unicron is approaching earth is not exactly the same as starscream retreating though (just for an example)