#4 Daniel Bryan

Ugh, where to begin with this one.
Daniel Bryan was the most popular superstar in WWE and probably all of wrestling in 2013.
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He had a really hot angle with The Authority and for a while, it seemed like it would lead to Bryan winning the 2014 Royal Rumble match and finally getting the better of them at WrestleMania. Now while that is what eventually happened, it is not how we go there.
Instead, Batista returned to the WWE for the first time in almost four years, and just two weeks before the event, rumors began running rapid that Batista would win the match and face WWE Champion Randy Orton at WrestleMania.
With this knowledge in place come the night, the fans were ready for blood should it happen. And it did. Batista won the match while Bryan wasn't even an entrant. It was one of the worst and most embarrassing receptions in WWE history.
Thankfully WWE finally listened to their fans and Bryan won his right to the main event and then the Championship to in the main event.
We also had an identical scene the following year, when Bryan was still the fan favorite to win the Rumble but was dumped out after just 10 minutes.