That's exactly what I thought too.
This game has me interested, but I've been burned by zombie games before. (I'm looking at you, Dead Island.) If they focus on the surviving and the zombies are really just part of the environment rather than a primary driving force then I'm all for it, but if they focus on "AH! Zombies!" then I will be sad.
@madbassman: Some of the enemies in Fortnite looked like zombies, but there were other gremlin things that were like phasing through the ground and a couple other types too. I think writing that off as a zombie game at this point might be selling it short.