the world may not be over yet, despite mayanpredictions, but the zombie apocalypse is far from over. the walking dead has officiallybeen renewed for a 4th season! this hardly comes as a surprise for fans of the hit graphicnovel-turned-amc drama, but there's a catch. deadline reports that showrunner glen mazzarais officially stepping down after the upcoming second half of season 3, due to creative differenceswith the show's executive producers. could his potential replacement mean a completelynew direction for season 4? let us know what you're hoping to see go down when the walkingdead returns and check back with us for more tv scoop from celebified.