Simplify the following text for a Grade 12 native English-speaking person.
Original: WWE released a complete DVD box set entitled SummerSlam : The Complete Anthology , which showcases every SummerSlam event from 1988 to 2007 in its entirety , on August 5 , 2008 .
Simplified: WWE released a complete DVD box set with the title SummerSlam : The Complete Anthology , which includes all the SummerSlam events , on August 5 2008 .