Some black and white drawings have surfaced, but not from an official source - http://tformers.com/transformers-ani...0966/news.html

As the link says, one is Alpha Trion, one is Dai Atlas (not sure about why this character/name is getting so much attention lately), and an unnamed Decepticon that could be a new form for an existing character (Lugnut perhaps?), or a new character who has had a revision done to its animation model (more likely, so that they can still sell the Lugnut redeco).