A friend of mine is a cast member and he works the Rockin Roller coaster at Hollywood Studios. He heard that once the contract with Aerosmith is over they are not renewing it and want to change the name of the coaster. They want it to be Disney branded with a Disney movie or star. The rumor is Hannah Montana is to replace Aerosmith as the star of the ride. I can see it now the "Hannah Montana Sparkle Express". LOL. Don't be suprised if Aerosmith no longer at some point will be associated with this ride.
Considering that Miley and Billy Ray are apparently trying to bail on Hannah Montana.... I doubt that will be the new theme.