Original: SummerSlam became one of World Wrestling Federation ( and later World Wrestling Entertainment ) 's most successful events and one of the '' Big Four '' pay-per-views , along with WrestleMania , Survivor Series , and the Royal Rumble .
Simplified: Along with WrestleMania , Royal Rumble and Survivor Series , SummerSlam is one of the '' Big Four '' pay-per-views and was one of the original four yearly WWE pay-per-views .