#1. Edge leaves WrestleMania as the new Universal Champion
Edge walked out of WrestleMania a decade ago as the World Heavyweight Champion, before heartbreakingly being forced to relinquish the Championship and retire from the business.
Last year, the Rated R Superstar was able to return to the ring full-time and has since been looking to wrong the rights of 2011. WrestleMania 37 is Edge's chance to win back the title that he never lost, and he could do it without even pinning the Champion.
Daniel Bryan was recently inserted into the match after it was reported Bryan is looking to move into a more part-time role with WWE. This means that it could also be Bryan's last chance to win the Universal Championship.
Roman Reigns won't be coming to the ring without a plan and the triple threat rules allow for some kind of interference. This means Jey Uso, and potentially his brother Jimmy, could be on hand to help Reigns.
But when the dust has finally settled on this year's main event, it's hard to see past Edge walking out as the new Champion.