AMC released the full-length trailer for The Walking Dead season 4 at Comic-Con and whatever you may think of the show as a whole, there’s no denying the awesomeness of their trailers.
Sounds like they may be channeling 28 Days Later with that radio broadcast, which might actually serve the show well. I have long considered 28 Days Later to be the best zombie flick ever made. (Some argue that it isn’t a true zombie flick because the zombies became zombies by infection rather than reanimation after death. Whatever. Splitting hairs as far as I’m concerned.)
Plus, it appears that Daryl gets loads of screen time and anyone who watches knows that more Daryl = happiness.