#5 Roman Reigns def. Goldberg (WWE Super ShowDown 2021)
This solely depends on whether WWE is able to travel to Saudi Arabia in February of next year. If they can, this is almost guaranteed to be the main event of the show over there. Goldberg won the Universal Championship at last year's Super ShowDown event and was supposed to face Roman Reigns at WrestleMania 36.
However, the Big Dog withdrew from the tapings of the 'Show of Shows' out of concern for his health due to the COVID-19 pandemic. A match between the two heavyweights would have been alright, but Reigns' character change would give it much more steam.
Roman Reigns could aggressively dominate Goldberg, who was seen on the ThunderDome screen during the Universal Champion's title defense against Braun Strowman last month. This indicates that the WWE Hall of Famer could have a title shot down the line, with Saudi Arabia being the best place for a match like this.
WWE should focus on the current SmackDown roster, with lots of talented stars looking to step up and challenge Reigns for the Universal Title. The Goldberg match might have a story, but it shouldn't happen at one of WWE's regular pay-per-views, especially WrestleMania.