#3 Kevin Owens vs. Seth Rollins - WWE WrestleMania 36 rematch
If WWE doesn't go further with Kevin Owens and Seth Rollins as a tag team, the two may face off at WrestleMania. The two have already wrestled at the event, but it was in front of no fans. Also, the story would be different this time.
Rollins and KO's recent friendship could combust as soon as Day 1, with both superstars potentially blaming each other for not winning the WWE Championship. It is a simple story, but effective nonetheless.
The match would do well, owing to the great in-ring chemistry between Seth Rollins and Kevin Owens. The only downside would be that the latter's run as a heel would be cut short, as The King of Drip isn't likely to turn babyface at all.
#2 Kevin Owens vs. Damian Priest - United States Championship
If Kevin Owens fails to win the WWE Championship, the United States Title wouldn't be a bad consolation prize heading into WrestleMania 38. The midcard belt has improved in value ever since Damian Priest won it at SummerSlam.
The Puerto Rican superstar has been booked strongly by WWE and regularly defends the US Title. He is also primed for a big match at WrestleMania, having teamed with Bad Bunny at this year's event. Owens would be a great opponent.
The two can have a solid match, with KO selling Priest's big moves perfectly. Both men could benefit from it. Kevin Owens can finally win a title again in WWE - it would be his fourth United States Championship. Meanwhile, it would free Damian Priest up for a main event run.