I doubt there's any way possible that the movie could approach the book in scope, imagination or quality of story; but with movies based on books that's not unusual.
The book, as mentioned earlier, follows an interviewer talking to survivors of the zombie war. This movie looks like its going to tell the story of one of the people who will be interviewed later.
The immense swarms that are shown in the commercials were absolutely vital in the book, btw.
In my mind, WWZ (the book) and TWD could very easily exist in the same universe. There's a surprising consistency there.
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