Vanessa Hudgens and Zac Efron Returned to East High — Could "HSM4" Be Happening?

It's unclear why Hudgens and Efron visited East High around the same time. Considering Hudgens previously shot down the idea of appearing in a fourth movie, some fans have been speculating the pair could appear in "High School Musical: The Musical: The Series"'s third season.

"Listen, I can't say anything," Bassett told "Daily Pop" on July 26 when asked about Hudgens's and Efron's mysterious visits to the set. "But all I will say is I was just as confused as you are. I don't know what's going on with that."

Only time will tell what their visits were all about.