#4 Seth Rollins comes in for cashing in
Most of the fans that look into the main event between Lesnar and Reigns only see two possibilities, Lesnar wins or Reigns wins. But one cannot simply ignore the possibility of Seth Rollins running down during the match and cashing in his Money in the Bank contract.
Rollins has been the top heel in WWE ever since he broke up with the Shield and winning the title by cashing in at WrestleMania will only help him to cement his place on the top.
WWE could do it in two ways. They could let Rollins come in between the match or they could let him come down post match and ruin the moment of the winner. Either way, Rollins will be showered with heat from the fans.