3. A Family Affair
This is probably the most outlandish suggestion on this list, as well as the most unlikely, but imagine the monumental sense of occasion Reigns vs. Rock at the Royal Rumble would bring. If WWE could possibly lure Rock in for a one-off appearance, they should definitely do so. In finding a reason for such a feud, we need look no further than The Rock's social media activity. He recently responded to a tweet mocking Roman's unpopularity with a laughing emoji, which could be easily interpreted as a lack of support - especially in the "volume turned up" world of professional wrestling. As with The Rock's feud with John Cena, WWE should allow the crowd to determine the face and heel of the rivalry.