#2 Finn Balor's one day reign

Well, we go right back to the beginning with this one. Finn Balor's Universal Championship reign was the most exciting thing WWE had offered for a long time when it happened.
After an undefeated streak, we saw Balor fast-tracked into the main event scene where he would defeat Roman Reigns and Seth Rollins on his way to the title, with The Demon even making his main roster debut at SummerSlam for the title.
Cody has no chance against John Cena? Details HERE
Sadly, though, Balor got injured during the match and still went on to finish the match.
Balor held the title for a grand total of 22 hours before relinquishing the title the next night and spending the best part of a six months sidelined due to the injury, never seeming to get back to the position where he once was.
Sadly, now, we'll never know what WWE was meant to look like with Balor freshening everything up by winning the title and becoming the inaugural champion.