The Rock is a legend, he deserves to headline more than anyone else on the WWE Roster. If anyone is selfish it's Cena for being in what 8 title matches in a row at Wrestlemania? Anyway, no way Rock vs Cena can be near as bad as Cena vs Miz this past weekend.
Not negative towards him, he's given more than enough to professional wrestling already. Although I would like to see him battle the Undertaker at Wrestlemania, I wouldn't be mad if he chose to pursue his music or acting career.
He's won every major literary award in the world except for the Nobel Prize.
In terms of the last 50 years, I'd even put him ahead of William Manchester, in terms of writing skills.