If you watch the trailer again, you'll see that this image is most likely taken from the scene where Thorin and company are trying to barricade the doors to Beorn's hall in somewhat of a panic.
The Hobbit: The Desolation of Smaug will be the first time we are seeing Beorn on the big screen, which has hardcore fans pretty excited. Mikael Persbrandt is playing the shape shifter, who lives in a wooden house between the Misty Mountains and Mirkwood, just east of the Anduin.
Here is a description of his participation in The Hobbit novel.
Later, hearing of a vast host of Goblins on the move, Beorn arrived at the Lonely Mountain in time to strike the decisive blow in the Battle of Five Armies, in his bear form, slaying the Goblin leader, Bolg, and his bodyguards; without direction, the Goblin army scattered and were easy pickings for the other armies of Men, Elves, Dwarves, and Eagles.
In the years between the Battle of Five Armies and the War of the Ring, possibly spurred by his interaction with Thorin & Company, Beorn stopped being a recluse, and rose to become a leader of the woodmen living between the Anduin river and the fringes of Mirkwood, rallying them against the remaining Orcs in the mountains. His people were known as the Beornings, and they helped defend Thranduil's kingdom at northern Mirkwood. As stated by Glóin in The Fellowship of the Ring, the Beornings also "keep open the High Pass and the Ford of Carrock." He presumably died some time before the War of the Ring itself began, and was succeeded by his son Grimbeorn the Old.
Even though Beorn could have been dead by the time, his death is not included in the chronologies in that book's appendices."
Some fans aren't too excited about how this popular character looks in the movie, though, pointing to this picture from The NeverEnding Story.
What do you think? Do you like Beorn as he appears in The Hobbit: The Desolation of Smaug?
The Hobbit: The Desolation of Smaug comes to theaters December 13th, 2013 and stars Richard Armitage, Martin Freeman, Benedict Cumberbatch, Ian McKellen, Aidan Turner, Dean O'Gorman, Ken Stott, Graham McTavish. The film is directed by Peter Jackson.