#3 Paul Heyman turns on Lesnar
Brock Lesnar and Paul Heyman's relationship has been well-documented as Heyman was a huge proponent of Lesnar's backstage even before he was The Next Big Thing.
But Heyman has turned on Brock Lesnar before. If Heyman decided it was a foolish venture to fight the WWE Champion but Brock Lesnar insists on doing the match, the Universal Champion's 'Advocate' could have enough during the encounter.
Heyman simply walking off during the match would be enough to distract Brock Lesnar so Jinder Mahal could make the move and win the match.
It's been fifteen years since Paul Heyman first turned on Brock Lesnar and they might be due for another feud with each other. It would certainly keep Lesnar entertained until his next Universal Title defence.