Mike Mitchell says that Sky High 2 was going to be called Save U, which is Save University.
However, reviews for Sky High were generally favorable and the movie saw some success when it was released on DVD.
It’s been nearly 15 years, so one can’t really see Disney going on to make a Sky High sequel, especially since all of the young actors aren’t so young anymore.
Superheroes are all the rage currently, so one could easily see Disney going for a remake of Sky High to further capitalize on their superhero success.