Rollins and Becky Lynch had beaten Baron Corbin and Lacey Evans in their winner takes all mixed tag match but Lesnar emerged after the match with Paul Heyman and briefcase in tow.
He hit the champion with two German suplexes and then, after the bell had sounded, an F5 for the victory and the beginning of his third Universal title reign.
The Undertaker teamed up with Roman Reigns to take on Shane McMahon and Drew McIntyre as the event got off to a red-hot start.
The heel duo were in control of the contest after an Elias run-in led to a top-rope elbow drop from McMahon onto Undertaker on a table and a coast-to-coast onto a trash can in the corner.
But the Dead Man sat up and completed his comeback with a Tombstone piledriver on McMahon for the victory.
Bayley successfully defended the SmackDown women’s championship by beating both Alexa Bliss and Nikki Cross in a two-against-one handicap match.
The champion blocked a Twisted Bliss by raising her knees and then hit Cross with a knee strike as she came off the top before a top-rope elbow drop for the win.
There was, however, a title change in SmackDown’s tag-team division with The New Day winning their sixth WWE tag crown in a triple threat match.
Heavy Machinery had their moments but it was a huge display of intensity by Big E to tee up a Midnight Hour on Daniel Bryan for the championship switch.
AJ Styles recaptured the United States title from Ricochet thanks to an assist from Karl Anderson and Luke Gallows, and a second-rope Styles Clash.
And there was also a title change on the pre-show for the event, with Shinsuke Nakamura defeating Finn Balor for his Intercontinental strap.
Samoa Joe, however, could not take the WWE title from Kofi Kingston as he ensured The New Day finished the night drenched in championships by seeing off his challenger with a Trouble in Paradise.