possible roles imo (in order)
1) Voice of Smaug
2) Voice of the Lord of the Eagles
3) The Warg rider general (character added by Jackson and del Torro to "enhance" the Battle of the Five Armies)
4) Goblin King (Bolg?)
5) One of the trolls that gets turned to stone (the only one that isn't CG)
He's too ugly to be King of Mirkwood and too cocky to be Bard. Beorn's a good guess, but I'm thinking they will go with someone fatter and harrier for that roll.
Also, according to IMDB, Gil-Galad was in the Fellowship. They don't have a picture of who played him, but if this is true, I'm even more disappointed that I didn't get to see him raging in all his Elf lord glory. And what's Jackson gonna do in the Hobbit when he has to portray the Elves as the selfish, greedy jerks they are?