#3 John Cena

John Cena is the biggest star the WWE has, and a bout with Angle at WrestleMania would be huge, but there would be a big history behind this. Back in 2002, Kurt Angle was offering open challenges on SmackDown, and it was a fresh-faced, young John Cena who answered it, bringing Ruthless Aggression to SmackDown for good.
Since that point, its been Cena rising up the ranks of the WWE, while Kurt slowly faded away to the independent scene, and John coming back to end Kurt would be a great story to tell.
Did you know a top WWE Superstar just wrestled outside the company? More details HERE
At the end of the day, it looks like Cena isn't going to be around much anymore, so it would be a tough one to build, whether they want to do it at WrestleMania, SummerSlam, or Survivor Series, but purely for that part of the story, John has to be considered a top candidate.