Saw a trailer for it last week and it looks like they've just made a Brad Pitt zombie film which is very, VERY loosely based on what I thought was a great and unique book.
I don't generally 'do' zombie stuff, but the book was on offer on Kindle and once I started it I couldn't put it down. Essentially, the book is a series of interviews (one interviewer travelling the world) with different people affected by a worldwide zombie infestation and covers how it began, how it built up, how the world reacted and how things are recovering after.
The film shows Brad Pitt being all action hero and leaving his family to go and aid in the fight against zombies. Then his family are in peril, he's trying to get back to them, etc.
Unless the trailer is woefully mis-selling it the film seems to have very little to do with the source material. Really gets my goat when they do this.