#1. 16-time WWE World Champion John Cena
Despite being tied with Ric Flair for 16 world titles, John Cena may never win a Championship in WWE again. Cena is firmly a part-timer now.
He may miss WrestleMania 37 due to his filming schedule and the COVID-19 pandemic. That being said, Cena will return to WWE once he can.
When he defeated AJ Styles to win the WWE Championship at Royal Rumble four years ago, Cena was widely expected to go on and win his 17th world title in the near future. That hasn't happened yet, and it doesn't seem likely that it will happen now. However, WWE can still tell a fascinating story surrounding his 17th world title chase.
There are many interesting scenarios Cena could find himself in when he comes back. The Firefly Fun House Match with 'The Fiend' Bray Wyatt at WrestleMania was a step in the right direction. He could challenge for the WWE or Universal Championship, attempting to win the record-breaking 17th world title, only to come up short.
This intriguing idea was pitched by Orton himself, who is now the favorite to break the record held by Flair and Cena. Either way, the Leader of the Cenation would likely end up putting WWE's biggest stars over instead of becoming a 17-time world champion.