Something peculiar has been posted by the Transformers: Dark of the Moon Facebook page. In a recent post it has provided a link to a "Transformers 4" page, which shows a dark image of the DOTM style Optimus Prime, "TF4", and the date 7.1.13. The page has no information yet and the picture could very well be photoshopped. But it's rather odd that the official Dark of the Moon page would provide a link to it if it was total baloney.
The link to the new page can be found here:http://www.facebook.com/pages/Transformers-4/243731955652597
EDIT: I'm not sure if the Dark of the Moon page is
the official page or not, but it looks legitimate.