So, I know this is only a short teaser of gameplay, but this looks like it could be really freaking good. If you know anything about Warhammer Fantasy, the Skaven are a swarm of batshit crazy paranoid moon rocks eating nuclear weapons developing society of rat people, who want nothing more than to destroy the surface world. From the looks of things, this game is going to be set in a Skaven overrun city, and you have to survive the crazy bastards.
I still have my doubts about how many new vidya games GW is trying to push, but Vermintide, Battlefleet Gothic and Deathwing have me optimistic at least.