http://www.youtube.com/watch?v=m6Z5gMvUqHE
Pick 1.04: The Rock
The most electrifying man in ALLLLLLLLLLLLLLLLLLLL of entertainment, and the most universally successful pro wrestler of all time.
In 2001 at WM 17, he was involved in the main event of by far the most profitable wrestling event of all time (at that time). More than 10 years later, he was main eventing WM28 which shattered the records of all the "dome period" WMs that have taken place since. So he was involved in record breaking shows twice.
In 2013, he was the highest paid actor in the WORLD. Suck it, Clooney.
Simply put there was nobody left with anything even close to the drawing power of the great one, making him and easy target to move up for and build the brand around.