The fan Braun Strowman picked out of the crowd to be his tag team partner against Sheamus and Cesaro was Nicholas Cone, the 10-year-old son of WWE referee John Cone.
For the second time in his career, Randy Orton walked into a WrestleMania in New Orleans as a defending champion, defended it against two or more superstars in a match, and lost when someone other than him was pinned or forced to tap.
The tune played on acoustic guitar by Elias during his ring entrance is "House of the Rising Sun", whose lyrics reference New Orleans, the location of this WrestleMania.
Ronda Rousey's in-ring debut.
Reportedly, Ronda Rousey's partner was supposed to be Dwayne "The Rock" Johnson, as teased back in WrestleMania 31, but he was replaced by Kurt Angle because he was working on a movie at that time, and the insurance affidavit for it forbid him from wrestling. (This was due to a previous similar incident, where he was injured while wrestling during the filming of another movie, and his recovery time caused a 6 week delay.)