#4 Youngest world champion

At the age of 24, Randy Orton broke Brock Lesnar's record and became the youngest ever World Champion when he defeated Chris Benoit at SummerSlam back in 2004.
Given the fact that WWE currently has a roster full of younger superstars and their own performance centre, it seems very likely that Orton's record could be broken in the coming year.
Cody Rhodes' uncle is a WWE Hall of Famer. More details HERE.
Paige was able to win the Divas Championship when she was just 21 years of age and set the record as the youngest champion, so, there is a good chance that one of the next World Champions is younger than 24. After all, WWE is trying to promote the next generation of stars right now and the likes of Tyler Bate and Velveteen Dream are young enough to break it right now, whilst Noam Dar and Pete Dunne are only just 24-years-old themselves.