HSM 4? already in works

Even though "HSM 3: Senior Year" isn't done filming...

Disney Channel Worldwide chief Rich Ross confirmed Tuesday afternoon that the channel is already starting work on High School Musical 4!

I have read in Details Magazine that Zac Efron doesn't want to reprise his role in HSM anymore and that HSM3 would be his last as Troy Bolton...

Maybe Ross was aware of that saying...
"Are we going to have all the cast back? Probably not," "Will we have some of them? I hope so."

Disney really knows how to make money out of their stars!It wouldn't take long for Disney to come up with another star and milk money out of them!