I don't know if this is just me, but I feel like this game will be included or be a cheap downloadable title, not a full-fledged $60 game. Having a PvP mode is a bit of a stretch; co-op makes more sense.
1.It's a ubisoft game, we have only seen a demo so there will be lots more levels to the game.
2.Why do people think Co-op suits survival horror more then PvP? are gamers losing their minds as to what survival horror means? You are meant to be the only person against hordes of zombies adding one more person kills off a bit the horror and survival aspects. I see Co-op in ZombiU like this if Co-op is added:
Player 1 goes through backpack - "ok dude cover me, make sure no zombies try to creep up on me"
Player 2 stands guard - "no worries dude I still have some ammo, I got ya back"
*Shrugs*