#3 Triple H and Braun Strowman have a face-off
Brock Lesnar will mostly retain the title at Royal Rumble. If that happens, the 'Monster Among Men' can enter the Royal Rumble and have a face-off with the Game.
Triple H hasn't been in the ring since his India tour and Royal Rumble can be the perfect place for him to come back. Their altercation at the Survivor Series was the only positive thing of the underwhelming main-event. If that feud has to continue, then Royal Rumble would be the perfect place to start the unfinished business.
If we don't see them facing again, then their brawl at Survivor Series becomes meaningless. The King of Kings has done a marvelous job till now by setting up the careers of Daniel Bryan, Roman Reigns and Seth Rollins in the WWE. Braun Strowman should be the next one in line to benefit from him