#1 Paul Heyman turns on Lesnar and costs him the title
All of us have witnessed Paul Heyman turning on his clients in the past - see CM Punk. And, as Lesnar is rumored to walk out of WWE before WrestleMania 35, the chances of Heyman turning on Lesnar are higher than ever now.
Heyman considered turning on Lesnar in the past, particularly at SummerSlam when "The Beast Incarnate" was involved in a feud with Roman Reigns. However, that didn't happen.
If Lesnar is serious about leaving WWE following the Royal Rumble PPV, Heyman turning heel on Lesnar to make Balor win the red brand's top prize will be a great move as it will bring Balor out to the limelight, and it will make fans invest more in Balor.
Therefore, expect any kind of swerve to take place in Balor vs Lesnar matchup this month at Royal Rumble PPV as you can't expect this match to go smooth as silk.