#2 The Undertaker and John Cena crossing paths again

The WrestleMania season always marks the return of some of the biggest names that have helped change the complexion of this business. One of them is the Undertaker. The Phenom's inclusion in the Road to WrestleMania is an obvious one, with many expecting him to make a gigantic statement by entering the Royal Rumble match.
Considering that John Cena was squashed in embarrassing fashion last year at WrestleMania 34, the Cenation Leader might be looking to seek some revenge. While none of them have been confirmed to be a participant in the Royal Rumble match, the company could be planning a rematch for them at this year's Show of Shows.
Cody Rhodes' uncle is a WWE Hall of Famer. More details HERE.
With John Cena and the Undertaker both working a very limited schedule, there's a genuine possibility that they lock horns again at the Rumble and settle the score.