Here is an updated schedule of WWE DVD releases for the remainder of this year, courtesy of PWinsider.com: 
7/24 – WWE Money in the Bank 2018
8/14 – WWE Extreme Rules 2018.

8/28 – 30 Years of Summerslam – “For 30 years, SummerSlam has been the ‘biggest party of the summer’, and WWE’s premiere summer event has been the place where champions were crowned, dream matches were made, and rivalries came to an explosive end. Now, relive the greatest matches & moments from the illustrious three-decade history of WWE SummerSlam! Featuring Bret Hart vs. British Bulldog from Wembley Stadium in 1992, Stone Cold vs. Undertaker from MSG in 1998, Shawn Michaels vs. Triple H from 2002, Shawn Michaels vs. Hulk Hogan from 2005, John Cena vs. Brock Lesnar from 2014, and much much more!”
9/28 – WWE Summerslam 2018.
10/2 – The Showstopper Unreleased: Shawn Michaels – “Shawn Michaels has had legendary bouts with Bret Hart, Kurt Angle, John Cena, Triple H, and many others. The WWE Universe may be familiar with many of them, but there were several excellent matches that have never made it to DVD. Now fans can own some of the Heartbreak Kid’s greatest matches that have never been released on WWE home video before.”
10/16 – WWE Hell in A Cell