#2 The magic AJ Styles and Samoa Joe create cannot be replicated by Reigns or Lesnar

We haven't seen Samoa Joe and AJ Styles in a WWE PPV, but we have seen these two face each other in TNA and ROH.
They always put on classics whenever they are in the ring together. Remember their Triple Threat match which also included Christopher Daniels? The match was rated 5 stars. At TNA Turning Point, their singles match got a 4.75 star rating.
Roman Reigns vs Brock Lesnar is in stark contrast, their highest rated match was WrestleMania 31 which got a 4.5 star rating, and the other two matches dropped down. At WrestleMania 34 - they got 3 stars, and at Greatest Royal Rumble they got a mere 1 star which is the lowest rated Universal Title defence.
They got 4.75 stars in a fatal four, and 4.5 stars in a triple threat which included more efforts from Dean Ambrose, Samoa Joe and Braun Strowman.
The WWE Universe is fed up with Lesnar vs Reigns. They want to see a new main event in the form of Joe vs Styles.