Found these pics on another forum.
This is Megatron in his Cybertronian form.
AFAIK, he'll end up selecting and scanning an Earth form sometime late in the movie...possibly a jet form.
Next pic is of Brawl in his Cybertronian form, also.
It's a pic of the toy.
Last pic shows 4 of the Autbots.
Optimus, Bumblebee, Ironhide, and I'm guessing Jazz.