#2 Randy Orton

This doesn't even need advertising. Randy and Batista have a long history of going after each other and trying to find out who is better of the two. There have been times in their career where Batista has had the upper hand while there have been others where Randy has enjoyed more success.
Batista at a point of his career left WWE to pursue an acting career while Randy has stuck around to become one of the biggest stars the company has ever produced. He's a 13-time world champion, which in some ways dwarfs what Batista has achieved in the squared circle.
The storyline tends to write itself and for a change this time, WWE can actually pit Batista as the heel who is on a mission to prove he's better than Randy.