Call of Duty: Advanced Warfare......Zombies?

Hey there everybody! It's been a long time since I've posted, there hasn't been too much information after Treyarch's hiatus. But now there is a lot of hype about Advanced Warfare's "Zombie" mode. A leak was released a few days before the actual game was released, showing a soldier escaping a mob of raging zombies, with a feeling close to the way World War Z depicted zombies. The video was immediately pulled from Youtube and any other site Activision could find. We all know how big a phenomena the COD Zombies mode is, and that Advanced Warfare is down 80% in sales compared to Black Ops 2. Why wouldn't Sledgehammer advertise this as a major selling point? More importantly yet: Why is SLEDGEHAMMER making  Zombies? Why is Sledgehammer making a game at all? The only Call of Duty games that Sledgehammer took part in before this was Modern Warfare 3, which was one of the most hated COD titles to be sold. From what has been seen from the game, this is basically just Call of Duty: Modern Warfare 3 featuring Kevin Spacey and gameplay functionality similar to Titanfall. The Exo Survival is scarily reminiscent of Survival (Again, from MW3) and the "Zombies Easter Egg" is a disappointment. It's basically just the Bot AI made to look bloody and ugly, without guns. The execution of the Zombies aesthetic is terrible. I'm sorry, my fellow die-hard fans of the Zombies mode. If you thought Advanced Warfare was your lucky break, you were wrong.