The latest Image Comics teaser for "The Walking Dead" hints at big changes in the coming months for Robert Kirkman and Charlie Adlard's long-form zombie epic. The image, promoting the series 80th issue and new "No Way Out" storyline, simply states "When the walls come down...no one is safe." When taken with the previous teasers' statements that "What keeps them out also keeps you in" and "Desperate times call for desperate measures," it's looking like the status quo is in for a major shake-up, which longtime fans know also tends to mean that more than a few characters may be leaving the series for good.