#2: Braun Strowman
It's hard to say whether the mystique of Braun Strowman has been irreparably damaged by his multiple failed Universal title matches against Brock Lesnar. If not, then Strowman could return to prominence by challenging Rollins for the gold, and be a fresh opponent for the Beast Slayer.
There have been few altercations between the two, and a Rolins-Strowman feud could lead to some exceptional storytelling by two Superstars who have consistently been cheered by the fans in a time where face/heel dynamics
If Rollins was to feud with the Monster Among Men though, we feel that Strowman would have to win the title from him, as anything short of a title victory would be the final nail in the coffin of Braun's Universal title dreams and main event push.