I was a huge, HUGE fan of The Rock during the Attitude Era and also his return as "Hollywood" Rock. Tremendous character and he always put on fun matches.
Having said that, The Rock in 2013 is stale to me. His initial return to Raw was electrifying. The build to the 1st match with Cena was electrifying. But everything since that has been overkill and has been mediocre at best. The Rock finally came back after what, 7 years? He beat Cena. He won the WWE Title one last time. He "passed the torch" to Cena.
What else is there left for him to do?
Sure, he will draw, he's an international star. If money is the motive, the WWE bringing him back as much as possible is the smartest move. But just speaking as a fan of The Rock and a fan of WWE in general, I wouldn't mind him sitting out WM 30.