Partial Source: Pwinsider.com
According to WWE sources, on top of his abdominal muscle injuries, The Rock also suffered a hernia during his WrestleMania 29 match with John Cena.
The Rock quietly flew himself home to Miami to be examined, and WWE officials were not aware he had left the Northeast until he informed them he would be at RAW at close to 3PM. That's when the backstage chaos and rewriting of the show started.
Initially, many were upset about him pulling off the show. But now the concern is that with the injuries and his Hollywood schedule whether he'll be interested in performing again in the ring.