The guests do seem a little slim, even their most famous character (the "Angry Video Game Nerd") doesn't seem to be 100% confirmed as having an actual physical presence this year. Maybe he'll be appearing via Skype as well.

There's apparently a mystery guest remaining who voices a very popular character. I hope they mean "popular" in general and not "popular" within the context of ScrewAttack, I'd love to see someone like Charles Martinent or David Hayter.