I really dont want another HSM...originally i didnt even want a third one, in the fear that it would ruin a good thing!! I LOOOOOVEEEE ALL OF THE HSM'S SO FAR...EVERYTHING ABOUT ALL OF THEM! but making a 4th one, and with different characters...now that would make me really sad! ): why ruin a great thing?!?! i WAS sad to see them graduate, but they did...so i dont think there really can be another one...unless its called...HIGH SCHOOL MUSICAL 4:HELD BACK
If they are considering making a HSM4, they should cast the original members. It wouldn't be the same without them and, personally, I don't think the majoriry of the mashabiki would take it seriously.
I just hope that if HSM4 is going to be made, the original cast members are in it.