From what I've read on a bunch of sites they say it's going to "follow the book" pretty much to a tee, I hope, and will take place all over the world. I've also read that it could very well raise the bar for zombie movies. They've already said that there will be scenes in the film with hundreds of zombies on screen at once.
So if you <3 zombies as much as I do, you should get pumped for this film and if you haven't read the book, I recommend that you do. It's a really good read.