This issue has variants.
Indicia is "Armageddon 2001" with no number, but #1 is listed on the cover.
Origin & 1st appearance of Waverider (Matthew Ryder). Monarch was originally meant to be Captain Atom gone bad, but when a fan divulged this plot thread, he was made to be Hawk of Hawk and Dover (per Anthony Durrant, August 27, 2006).
Story continues in Superman Annual (DC, 1987 series) #3.