He's back. A hero for our millennium. And not a moment too soon, because during the five years (much longer in movie-fan years!) Superman sought his home planet, things changed on his adopted planet. Nations moved on without him. Lois Lane now has a son, a fiance and a Pulitzer for 'Why the World Doesn't Need Superman.' And Lex Luthor has a plan that will destroy millions - no, billions - of lives.