So you're the highest rated cable tv series of the moment, you've only got six episodes for season one and have been greenlit for 13 episodes for season two, there's press everywhere about how great the series is even though it is essentially about a zombie apocalypse, so what do you do if you're the producer? That's right, you fire you're whole damn writing staff.
Wha? Well, it looks like Darabount wants to go with freelance writers for season two. He may run afoul of the Writer's Guild though since this is a huge Hollywood project and is very high profile. Good luck, Frank, you'll need it...but remember, if you fuck it up, you'll probably never work for anyone other than Stephen King ever again.