New article
http://www.movieweb.com/news/NEKFkQLON5dtOO.
According to both that article and imdb Ron Perlman, Doug Jones, and Kiran Shan are also going to be in. While Kiran Shan is probably going to be the double or stuntman for Bilbo's actor (he was Elijah Wood's), I really can't think of roles for the others.
Ron Perlman could possibly be Beorn, I guess.
On the other hand, Doug Jones kinda remind me of Dr. House. I have a fear that this is somebody's idea of Thranduil. If that happens I am starting a thread called "What part of "Elven Lords are not ugly" do you not understand Jackson?" Honestly Elrond and Celeborn where just ugly in Lord of the Rings. Does Jackson have something against Elf Lords? Arwen, Legolas, Galadriel, Haldir were all cast well.