Alright, so from the trailer, we've seen the Decepticons coming up out of the Moon's surface, to head to Earth through a spacebridge. In the first trailer, we saw that the space race was jump started by the discovery of an Alien (Transformer) ship on the Moon. It's the Ark, obviously, and we now know that there were other Decepticon ships crashed on the Moon as well. My theory about the moon is... all those craters covering the surface of it? They weren't created by meteors hitting the surface. They were created by Transformers and Transformer ships crashing into the Moon. Over time, the dust buried them underneath the surface. For every crater, there's a Decepticon lying in sleep underneath it.