And here’s part of the same image, brightened up a bit using Photoshop (courtesy of the guys at tformers.com):

Interesting. 

My guess is the face belongs to the character “The Fallen,” and his face just happens to look a lot like the Decepticon symbol:

Very Egyptian, pharoah-like, wouldn’t you say?

Michael Bay and company shot scenes at the pyramids in Egypt.  I hope this doesn’t turn out to be one of those “The-Transformers-played-a-role-in-the-development-of-ancient-human-civilizations” things, like Alien Vs. Predator.