#1 To set-up the eventual feud between Bray Wyatt and Roman Reigns
While Bray Wyatt winning the Universal Championship at SummerSlam was big news, that was not how the show closed. WWE hyped up the "you'll never see it coming" tagline for SummerSlam a lot, and did deliver in the end as the former Universal Champion, Roman Reigns made his return during the closing moments, taking out both Bray Wyatt and Braun Strowman.
Interestingly, he teased a change in his character, showing some heel tendencies which would surely be a welcome change. Roman Reigns was supposed to face Goldberg at WrestleMania 36 but he dropped out at the last moment due to some health concerns. If he had faced and won the Universal title at WrestleMania, we might have just got Roman Reigns vs "The Fiend" Bray Wyatt SummerSlam instead.
The Big Dog has made it clear that he wants the Universal Championship and we might now finally get the feud between Roman Reigns and "The Fiend" Bray Wyatt. Though one has to wonder whether WWE is again rushing into is as Bray Wyatt dropping the title to Roman Reigns quickly would again lead to a massive fan backlash. Let's see what this will lead to!