Re: 'Walking Dead' renewed for Season 3
One of the nice things about announcing renewals quickly like this is that viewers who enjoy a show don't have to worry about being left with a show that ends on a cliffhanger.
But as Farscape fans can attest, even a renewal isn't a guarantee. If the ratings for the rest of the season tank, you can bet this decision will be looked at again.
Not that I expect the ratings to tank, but it's just an example.
"They have to help the viewers let go. Firefly did a movie to wrap things up. Buffy the Vampire Slayer continued on as a comic book. Heroes gradually lowered the quality season by season until we were grateful it ended.” - Sheldon Cooper