I somehow severely doubt that The Walking Dead, Game of Thrones, Girls, Homeland, Adventure Time, Mad Men, Parks and Recreation, Sons of Anarchy, New Girl, Louie, Children's Hospital, and South Park are getting cancelled anytime soon, and I'm pretty sure that amazing shows like the about-to-end Breaking Bad or the timeless classic The Sopranos were never cancelled. Most are critically acclaimed award winners, and all are incredible commercial successes for what they are. So no cancellation for them. Even The Wire managed to hang on just enough to finish.