http://io9.com/5353248/kirkman-tv-can-make-the-zombie-movie-that-never-ends


"The thing that makes "The Walking Dead"
unique and interesting is that it's a zombie movie that never ends –
that's the log line or whatever. To do a zombie movie that's based on
that? Kinda dumb. The whole idea behind the book is that it's a
long-term exploration on the characters and their situation and how
they're dealing with these problems over a long period of time, the
different things that happen to the characters and how it affects and
changes the characters. You can do that in a series of movies, but it's
not ideal. It's not really common for people to go, "Oh, I'll buy this
thing and commit to making 10 movies based on it!" So, the TV show
makes way more sense to me for all of those reasons."