#4 The Shield reunion
To be fair, this one was not WWE's fault in any way.
Watching Dean Ambrose and Seth Rollins finally reunite with one another after a week-long build was super satisfying. Still, fans were curious to see if Roman Reigns would also join his former Shield brethren and dominate the roster once again.
About two months after Ambrose and Rollins finally fist-bumped (yes, this was what they actually build towards), WWE finally gave us our wish - The Shield was back, and they were scheduled to face The Miz and The Bar at the TLC pay-per-view.
Unfortunately for us, it would not come to be.
Shortly after The Shield's reunion, Roman Reigns went down with a case of viral meningitis, which put him on the shelves for about a month. When he did eventually come back, they wrestled a dream match with The New Day at Survivor Series, which saw them get the win in a terrific bout.
Reigns became the new Intercontinental Champion by defeating The Miz, so Rollins and Ambrose swore that they would regain the Tag Team Championships so The Shield could hold all the gold once again.
Once again, it would not come to be.
Before he and Rollins could get their hands on Sheamus & Cesaro in a rematch, Dean Ambrose suffered a triceps tendon injury, which apparently will keep him out of action for up to nine months. Ouch.
It's very unfortunate that The Shield's comeback was so plagued by injury, as they could have gone on such a tear together.