Own the rights?
The following FAQ entries may contain spoilers. Only the biggest ones (if any) will be covered with spoiler tags. Spoiler tags have been used sparingly in order to make the page more readable.
For detailed information about the amounts and types of (a) sex and nudity, (b) violence and gore, (c) profanity, (d) alcohol, drugs, and smoking, and (e) frightening and intense scenes in this movie, consult the IMDb Parents Guide for this movie. The Parents Guide for High School Musical can be found here.
We don't know. There are hints that he isn't around: Gabriella saying she has to help her mom unpack; wistful comments about waltzing with her dad.
No, High School Musical 4: East Meets West is in production, but High School Musical 3 will be the last of the series to star the original cast: Vanessa Hudgens (Gabriella), Zac Efron (Troy), Ashley Tisdale (Sharpay), Lucas Grabeel (Ryan), Monique Coleman (Taylor) and Zeke Baylor (Chris Warren Jr) will not be returning for the fourth movie. [source needed]
The extended version features one new scene with a running time more than 5 minutes. A detailed comparison between the theatrical version and the unrated version can be found here.
r73731