For those who are not aware, The Walking Dead is an Image Comics comic book series as well as an AMC TV series.  Looking at the first photo posted in this thread, the pin is almost certainly based on the TV series (note "AMC" on the top left hand corner).

Here is an indication of how good the pin could look if it was based on the comic book series.


http://collider.com/wp-content/uploads/walking-dead-comic.jpg