#2 John Cena, The Big Show, and Justin Bieber Vs. The Wyatt Family (SummerSlam 2014)
Yes, you read that right: Pop star Justin Bieber was once slated to appear in a WWE match. Though this proposed match nearly took place in 2014, this wasn't the first time the Canadian had been teased to work with WWE, as rumors ran rampant that it was going to be Bieber hosting WrestleMania 27 in 2011, instead of The Rock.
According to former WWE writer Kevin Eck, the plan was for the Bieber to team with established stars John Cena and The Big Show, to take on the demonic Wyatt family at SummerSlam in 2014. Obviously, the match didn't happen, and it's probably for the best, as we don't think any amount of puppets or masks would have helped Wyatt's mystique recover if he got pinned by the 'Baby' singer.