One of the things that's going to be interesting to me to watch this season and I'm sure the next is how do they keep the show, "fresh," without having a semi-duplication of the same storyline over and over which is: character A faces an extreme event either with the zombies or the other survivors and either is killed or finds some miracle way to survive.
To some degree the cannibals - assuming that's what this group is - is somewhat familiar to Woodbury. And from what I can gather from the comics, Ricks eventual move to the suburbs of D.C. is a repeat of the same.
This show isn't episodic like The Simpsons and viewers will eventually IMO want some sort of search and eventual find for a, "cure." I'll be very surprised if TWD can hold onto it's 13 million + viewers weekly through season 5 if they start to rehash and rinse repeat the same plot lines.
I'll also be surprised if the series can last beyond year #7. At some point the public's fetish for the zombie genre will wain.