10 Times WWE Let Everyone Down At SummerSlam

10. Brock Lesnar Bludgeons Randy Orton (2016)

WWE went into SummerSlam 2016 with a ton of momentum and one of the most exciting pay-per-view cards they'd assembled in a long time, but it was a largely disappointing night. A gruelling six-hour show, it featured a great John Cena vs. AJ Styles match, but almost everything else failed to meet expectations, particularly Brock Lesnar vs. Randy Orton.

It was 'The Viper's' first match since suffering a serious shoulder injury in October 2015, and inexplicably headlined the show over two World Title matches. This would've been fine had the match delivered, but it didn't. Orton and Lesnar spent more time brawling around ringside than actually wrestling, working to a bloody conclusion that put Brock over as a beast, but put Orton at tremendous risk.

The finish saw Lesnar mount his opponent before battering his skull with legitimate MMA-style elbow strikes, opening up a big cut on Randy's head. It was pre-planned, but Orton suffered a concussion, forcing him to pull out of a match with Bray Wyatt at Backlash the following month.

A completely unnecessary way to end the show, it didn't provoke the desired sense of shock from the audience, and instead left us wondering what the hell WWE were thinking.