A child walks into a candy store, and upon seeing the biggest lollipop his eyes have ever lay upon, he knows instantly that he must have it. He goes to the storekeeper and asks to purchase it, to which the man replies: "I'm sorry, but it's for display and is not for sale". The child is angered and demands to have it, and finally resorts to begging and whining. The storekeeper, realising how much owning it means to the child, sees a business opportunity. He hushes the child and says to him: "Very well, you can may buy it, but it will be expensive". The child, not caring for the cost of such a prize, hands him the money. The storekeeper then takes the lollipop and hands it to the smiling child, who promptly skips home to enjoy it. With bated breath he takes the first lick, only for his face to turn sour and his eyes leak tears. The lollipop is plastic, and what he imagined to be the amazing taste of sugar, was in fact, the un-taste of acrylic.
Seriously though: Another game fell flat in the face of massive hype, and everyone is surprised? It happened with Mass Effect 3, it happened with Duke Nukem: Forever. It has happened many times before, and will continue to happen.