#3 Have a young star eliminate John Cena from the Royal Rumble

A lot has changed in The WWE over the past decade or so, but one thing that has always stayed the same is that a win over John Cena means something! Take the January 13 episode of Monday Night Raw for example, where Finn Balor pinned Cena clean and earned a chance to face Brock Lesnar for the Universal title.
Not only did that win instantaneously give Balor the credibility he has needed for a long time, it also went a long way in proving that Balor was indeed a threat to Lesnar's title. With that being said, and a win over the Cenation Leader having that kind of effect, why not do something similar between Cena and a young star at the Royal Rumble?
WWE's huge mistake with John Cena revealed - Watch Here!
Think about it like this! Cena comes into the Royal Rumble and starts eliminating people left and right. He eliminates several top contenders until finally a young talent comes and takes him out! This way, the moment gets a huge pop from the fans, and it sets up Cena versus a young talent at WrestleMania 35.
Paul Heyman's downfall need to be studied - Check!