@cbishop: If you're in the minority on wanting a universe that legitimately ages with its readers, then I'm there with you. That would be the best way to keep readers interested as they get older, and also draw in new ones.
"See, Johnny? When I was a boy, PowerKid was PowerMan's sidekick, and now he's PowerMan and HIS son is PowerKid. Guess who we're going to be for Halloween?"