Are these the times you have Bix?
Bell to bell times for SummerSlam as of right now: Cena vs. Lesnar = 25 minutes;
Brie vs. Stephanie = 15 minutes (both have been training hard with the goal of having a good match); Reigns vs. Orton = 20 minutes (what the hell?!?!); Ambrose vs. Rollins = 15 minutes; A.J. vs. Paige = 12 minutes; Rusev vs. Swagger = 12 minutes; Jericho vs. Wyatt = 15 minutes; and Ziggler vs. Miz = 10 minutes. That's how the show is laid out, too, albeit in reverse order, obviously.
That's 124 minutes on a 3 hour show. Sounds highly unlikely to me unless Ziggler/Miz or AJ/Paige gets bumped to pre-show. And even then it's a lot more than what they usually do on PPVs.