Simplify the following text for a Grade 10 native English-speaking person.
Original: The only exceptions to the pay-per-view split were the `` Big Four '' events ( Royal Rumble , WrestleMania , SummerSlam and Survivor Series ) which remained inclusive of all WWE brands .
Simplified: Only the Royal Rumble , WrestleMania , SummerSlam and Survivor Series events used people from different brands .