There's been talk backstage about doing a major double turn between Seth Rollins and Roman Reigns, according to Daily Wrestling News. Due to Roman Reigns' recent Wellness Policy violation, Vince McMahon put a halt to Reigns' monster push and booked him in the U.S. Title feud with Rusev to make him work his way back up.
With Finn Balor's injury, RAW is left without a top face (that fans actually like) hence why the WWE is discussing pulling this double turn.
One thing's for sure; the crowd would definitely cheer Rollins as a babyface and would take great joy in booing a heel Roman Reigns.