#1 It is a dream match

SummerSlam is the second biggest pay-per-view of WWE. While several dream matches take place at the Grandest Stage of Them All, the same happens at the biggest show of the summer. We are expected to see some big matches at SummerSlam and a match between Demon Balor and the Fiend could stand out from the rest.
Since making main roster debut three years ago, Balor has been a regular performer at SummerSlam. As a matter of fact, Balor brought his alter ego in the last three events of SummerSlam and we could expect the same scenario this year. The Demon Balor also locked horns with Bray Wyatt two years ago at SummerSlam where the former defeated the latter.
The Fiend and Demon Balor are the two most intimidating personas of Vince McMahon's company, so, a bout between two dark characters could be a dream match for the WWE Universe. Bray Wyatt lost to Demon Balor two years ago and the new Bray Wyatt will be eager to avenge his previous loss.