#4 WWE WrestleMania 39 - Roman Reigns vs. The Rock
This is the WrestleMania main event that will be pushed back a year, purely because of the location. Roman Reigns isn't going anywhere, and will likely remain the top dog in WWE in two years. The Show of Shows will take place in Hollywood in 2023, which instantly awakens talk of The Rock making his return.
It very well might happen, with the stars aligning to perfection. As long as Reigns retains his Head of the Table persona, a fantastic story can be told between him and his distant cousin. The current Universal Champion wouldn't even need the belt heading into a match of this magnitude.
WrestleMania 39 will mark ten years since The Rock's last in-ring outing for WWE when he faced John Cena. However, he will definitely put on a spectacle at WrestleMania 39. The People's Champion will not want to disappoint in what will likely be his final match.
WWE cannot book a bigger match than Roman Reigns vs. The Rock any time soon. The company should do everything in its power to secure the Hollywood icon for a 'Mania match. The potential upside is enormous, from a creative and business sense. It is the perfect storm.