Quite the looker eh? The images popped up over at a French
Tolkien site (via One Ring.net), and seem to be taken from some type of card set. There is also the following description of the Chief Goblin and his minions from the upcoming movie. (translated)..
"The Goblin King is a huge, grotesquely bloated monster, that in the years of his tyrannical rule over the miserable inhabitants of the Goblin town, grew fat and flabby. The Goblin town is a collection of skew-whiff ramshackle huts deep in the caves of the Misty Mountains. He commands a bunch of foul, polluted, with scars and ulcers studded goblins.
Basically, they are bandits, they live by what they can pick up from passengers on the passes through the mountains. The Goblin King and his followers manage to capture Bilbo and the dwarves. The Goblin King is more wily and smarter than it seems. He takes pleasure in torturing his prisoners — he almost succeeds to finish off Thorin Oakenshield and his companions."