...the future of that issue of Superman, where the 1980s and 1990s were still the future, and not a happy one at that.
Still, looking back at the future has to start somewhere, so, let's start with Superman, beginning at almost the ending.....
Costume, Costume -- Who's Got The Costume?
But, what led to the Great Disaster and that horrible future?
That was the result of a collection of many alternate future titles DC had published over the years.
In that first issue, readers are introduced to perfectly average stock boy Buddy Blank, who was transformed by scientist Myron Forest into OMAC, the One Man Army Corps (a being whose density could be controlled, as well as energy manipulated around), by Brother Eye, an orbiting satellite housing an advanced computer. Dr. Forest died, unable to replicate the experiment, so OMAC was the one soldier of the GPA (Global Peace Agency) to fight the evils that faced this new corporate dominated world.
That's where OMAC was left as the Superman issue came out.
Their original adventures ended in Strange Adventures #160 (January, 1964), helping a group of orphan boys in this ravaged world of 1992.
....as, Hercules and crew met the Atomic Knights in Hercules Unbound #10 (April-May, 1977) by Cary Bates, Walt Simonson and Bob Layton (thus going from 1985 to 1992 in their world's timeline...
....perhaps some odd help from blind Kevin suddenly being able to fly a plane (!!!) and taking the group from Europe to America, perhaps going through a small time warp thanks to Lady Sims). Finding one of the Knights (Bryndon) replaced by an energy creature, the Knights had been trying to restore the dense water bricks of Dr. Skuba...and Hercules aided in this, as well as defeating the energy creature, getting a new armor forged in a Detroit auto plant in the next issue, and finding out that one of his own was possessed by the anti-Ares, one of a group of duplicate gods held by the chains Hercules broke back in that first issue....leaving Hercules and his unaffected companions to rebuild the world in 1992 when the series ended with Hercules Unbound #12 (August-September, 1977).
Atomic Knights were only a simulation in Gardner Grayle's mind....but, that revelation (and Superman's meetings with OMAC and Kamandi, and Batman's meetings with Kamandi before the Crisis On Infinite Earths, where all these futures changed at the Dawn Of Time with issue #10, which came out in October, 1986 - with no WWIII) are a story for a future time!