#1 Should Not Be - Seth Rollins/Brock Lesnar
As mentioned ahead, WWE has locked Seth Rollins vs Brock Lesnar in as the main event of WrestleMania 35. This means that WWE Creative have to keep Roman Reigns from the main event picture at least until April 8.
However, Vince McMahon would try his best to include Roman in the Universal title picture heading into the Show of Shows, where Roman would enter the Universal Championship match because he had never lost the title. His Shield brother Seth Rollins would agree to share his opportunity making the main event of WrestleMania a triple threat match.
If the WWE Creative pulls off this move, the fans will turn their back on Roman Reigns again and will boo the WrestleMania main event once again. Roman Reigns can enter the Universal Championship picture after WrestleMania 35 but the Creative team should keep him away from the title until their grandest pay-per-view.