#5 Bobby Roode vs. Dolph Ziggler for the United States Championship at Wrestlemania 34:
Dolph Ziggler won the United States Championship at Clash of Champions 2017 and vacated the title on the following episode of Smackdown pretending to leave WWE. This led to a tournament taking place, which would crown the new US Champion which was won by Bobby Roode. Fans thought that this would lead to Dolph Ziggler coming back to WWE to claim that he never lost the championship. This could then lead to a match at Wrestlemania 34 to settle the dispute and crown the rightful champion, much like the Michaels/Ramon rivalry in 1994.
What we ended up getting was Roode losing his championship to Randy Orton, while Ziggler silently made his return at Royal Rumble and got eliminated after a forgetful performance. The whole story-line of Ziggler winning and vacating the US title was forgotten and wasn’t even mentioned ever again. At Wrestlemania, Roode had a match with Orton and Jinder for the US title while Ziggler participated in the Andre the Giant memorial battle royal.