If Ronnie wanted to come back to a show, it would be a good move to compete in Joe Weider's Pro World Cup, which will be in Berlin, Germany on October 3rd. The overall prize money there is $100,000, the largest after the Olympia and the Arnold, and one week after the 2009 Olympia.
Hey, if he looks good, he may even compete in the Olympia and surprise people...
As for Chris Cormier, he was at the 2009 Ironman backstage, and it is going to be tough for Chris Cormier to make that comeback, unless he is seriously dedicated.