There are also reports of this game being on the difficult end of the spectrum; well, at least by today's standards. The people at NowGamer also had a chance to play the game, and speak with some of the developers at Ubisoft. When they commented on the difficulty, they were answered with: "We really want to target and challenge the gamers with ZombiU because this game is very hard."
One of the things to note is that, yes, you will die. Most people will die a lot. Every time you die, you will also have to play as a new (randomly generated) character. You will need to learn from your past mistakes, so that you can improve your tactics, and survive longer, and longer each time you play. You will even get a chance to kill your past characters, who are now zombies, to get some of your gear back.
There is also a special Survival Mode unlocked once you beat the game for the first time. In Survival Mode, you must try to beat the entire game without dieing a single time. So, it seems that those who like a challenge might want to add ZombiU to the list of titles they get at the launch of the Wii U!