One of the more mediocre projects to come out of the Disney studios is Up Up And Away, a story about a normal kid who can't quite fit in with his family of superheroes. This same premise was put to better use in the film Sky High that starred Kurt Russell which was also for the Magic Kingdom.
In fact even more to the point I saw this plot also used in Saved By The Bell where Zack uses subliminal advertising in a music tape to get his woman Kelly. Here the villain is science teacher Kevin Connolly who is getting the kids at his high school to commit crimes on his behalf.
Robert Townsend and Alex Datcher are the parents of young Michael Pagan who if he's going to be a superhero should get his superpowers by puberty. He's got an older brother and a younger sister with same, talk about a competitive family.
Sherman Hemsley is in the cast as the grandfather of the superhero clan, imagine George Jefferson with superpowers that have gone a bit rusty and you have the Hemsley character.