#2. Paul Heyman wouldn't need to be replaced as Brock Lesnar's advocate
Paul Heyman has been by Brock Lesnar's side for almost his entire career and it's hard to imagine The Beast Incarnate in WWE without his original advocate.
Roman Reigns has enjoyed the power and confidence that aligning yourself with Paul Heyman can do. But, if given the choice, it's hard to believe that Heyman would choose Roman Reigns.
Brock Lesnar and Paul Heyman are close friends both inside and outside the ring and have a lot of respect for one another. These are facts that are well-known by the WWE Universe.
If Brock Lesnar's return includes a feud with Reigns over on SmackDown, don't be surprised if Heyman decides to switch sides at some point in order to return to Lesnar.
Lesnar and Heyman's pairing is one that would be very hard to replicate, which could be why it's taking so long for Lesnar to make his return to WWE. Hopefully, there isn't a time where we have to see Lesnar without Heyman.