Superman: Doomed

Its name is Doomsday. It came from the Phantom Zone, where the Man of Steel
had banished it once before. Bigger. Deadlier. Capable of killing life on
Earth.
Only Superman can stop it. But even that is not the end. Evil is in
its blood. And when that blood is spilled, the innocent will fall - and
Superman himself will discover the monster within. The Last Son of Krypton may
become a destroyer of worlds himself, leaving the Earth without its greatest
protector. Superman and his allies each must make a choice. If they unleash the
monster, will they lose the man? Is this Earth's last shot at salvation, or are
Superman and everyone he cares about...