The screens show off plenty of chaos, zombies, explosions, and big guns. There's also some close up renders of the character models. I'm not so sure I dig the helmets, as the first game instead changed the look of your agent as you upgraded, this one looks to do the same but covers your face rather early.
Perhaps the helmets will be optional? Either way I can't wait to dive into four player co-op, or 8 player co-op survival on this one!