Hmm... Maybe Vader is Palpatine's grandson, left to him after the boy's parents died. He is of course still a creepy old bastard, and still tries to make like him. Instead of the death star we have maybe it's the school, the empire being the hall-monitors and the local bullies that he's wiped into shape to do his bidding. Tarkin is Palp's little bitch, helping him into turning a small army of the hooligans while Jabba... Well... Jabba sorta has a little mafia made up of the kids who won't bend a knee to Palp, having them do various odd jobs around the school(Like making a few of them beat kids up for money so he could pay for another fried frog burger).