DC · December, 1980
1st Appearance of Superman II (Jorel Kent); 1st Appearance of Superman III (Kalel Kent); Origin of Superman II (Jorel Kent); Origin of Superman III (Kalel Kent); Superman 2020 feature; Superman 2020 story; Time travel
Twice Upon a Time!; Superman 2020: The Debut of Superman III
Writer: Cary Bates
Artist: Curt Swan