I'm sure one could suspend disbelief long enough to endure.
After all, think about the title. High School Musical. Three. It's the third in a series of melodramatic musicals based around themes of archetypes in high schools.
After the first one, I'm pretty sure I'd rather french kiss a live blender than sit in front of any more "films" named High School Musical.
If kids are smart enough, they'll see through the tapestry of thinly woven shit.