From a spy report on AICN, validated by a staff member that just came from the set....
Next up was Hellboy 2. Now I've never seen Hellboy (I own it but have never watched it) so stop me if any of this stuff is common knowledge. All of the original cast are back (Jeffrey Tambor was in the original? Get the fuck outta here!) including Perlman, obviously. Voice Over Man did mention a few new additions to the cast; Johann, a dude made entirely out of gas (decked out in a cool Bioshock-esque suit) plus a troll with one eye called Mr. Wink. Also, and this may be a rather large spoiler, but it seems there's a five storey high monster (tentacles, eyes and shit, hard to see from the concept art) that attacks the Brooklyn Bridge. Saw some concept art for the Golden Army, and they kinda look like bigger, badder, golder versions of the Destroyer druids from Episode 1, crossed with a bit of General Grievous. But not lame.