Plot: The American professional wrestling promotion WWE has been broadcasting PPV events since the 1980s, when its classic "Big Four" events (Royal Rumble, WrestleMania, SummerSlam, and Survivor Series) were first established with the company's very first PPV being WrestleMania in 1985. The company's PPV lineup expanded to a monthly basis in the mid-1990s following the introduction of the In Your House series of pay-per views before expanding even further in the mid-2000s during the first WWE brand extension