Here's an excerpt from a GQ Interview with Robert Kirkman.
The quote is from the interveiwer.
"This book's gone to some pretty crazy places over the last 75 issues. I can't wait to see some of the stuff from later in the run show up on TV. I'm really psyched for, like, season three, which is a weird way to feel about a TV show that hasn't even started yet."
Heres a link to the whole article. I read it and don't think there are any spoilers.