Miley Cyrus would be a mistake
If the girl actually appealed to a wide range audience and had more of a long standing career then maybe I could see this happening, but to me would be a total mistake. I was just trying to think which band could take Aerosmith's place, U2 or Coldplay, maybe, but I think that Aerosmith really works for the attraction, even though I'm not a fan of the music, I think that they really fit the attraction and hearing Steven's howell counting down the launch always gives me a thrill, I don't know who else would give off the same level of excitement. Now another thought I had was maybe instead of having just one band be featured, maybe Disney could approach multiple bands to record their own pre-show video and tracks for the ride so that when you ride it at different times you get a new experience. Nothing would have to change during the ride itself as its just the experience of a wild ride to a concert through the streets of Hollywood.
Now if it is truly just a rehab with no change of the band, what I hope is that they will start to include the CM back in the recording studio during the pre-show so that when Joe Perry motions and says "Chris, can you grab my black Les Paul?" he's not motioning to no one.