Sorry if this has been posted before but I was going through the trailer frame by frame (like the nerd I am) and i found two things: This first one is a clear(ish) picture of the face of the Constructicon rampaging and smashing helicopters. To me, it looks like he has four yellow eyes. They are definately not sparks because they are a darker colour and you can see them moving in the trailer. The second one is when the Audibot smashes through the building a transforms into alt mode. If you watch carefully, you can see some bots chasing him. I'm convinced that they are the bikes we saw a while back. When I was watching, I definately saw a pinkish/purple robot and a blue one. That means that the bikes are'nt drones, they are seperate robots. I hope that this is of use to someone and like i said before, sorry if this has already posted.