From Bleeding Cool, here is the first look at the first poster for The Hobbit: The Desolation of Smaug. According to The Lebanese Cinema Movie Guide, the first trailer may appear online on Tuesday at 10am PDT/ 1pm EST. This has not been officially confirmed but I would be truly surprised if the trailer isn't attached to Man of Steel so an early release is also likely.
Update: The One Ring reports that the poster is fake and makes a pretty convincing argument about it here. Assuming the actual official poster isn't enough proof.