#4 The return of The Big Dog

In October 2018, Roman Reigns vanquished his Universal Championship and bid a temporary goodbye to the WWE Universe to "kick Leukemia's a*s". The entire fanbase of the pro-wrestling company united to pray for The Big Dog's speedy recovery and just a few months later, it was proven that their prayers have been answered.
Roman Reigns returned on the February 25, 2019 edition of Monday Night RAW and announced that he's in remission. The news was greeted with tremendous pop from the fans in attendance and is undoubtedly, one of the best RAW moments of the year. He returned to action that very night when he joined Seth Rollins and Dean Ambrose (now, Jon Moxley) to fight off Corbin, Drew McIntyre, Elias, and Bobby Lashley.
In the coming months, Reigns proved that the fatal disease hardly affected the prowess of The Big Dog. He not only picked up significant victories over the likes of McIntyre, Shane McMahon, and King Corbin but also guided Team SmackDown to a win at Survivor Series.
Returning to the World Championship scene is only a matter of time for Roman Reigns.