Issue The Weird #1
Subtitle Conception
Date April 1988
Writer(s) Jim Starlin
Artist(s) Berni Wrightson, Dan Green
storyline Superman saw an explosion in downtown Metropolis and went to investigate. Above, he found a ribbon of energy. When he touched it, he was thrown back more than three miles. When he got back to it, Captain Atom, Martian Manhunter, and the Justice League were there. Dr. Fate noted it as being mystic in nature. When Green Lantern (Guy) attempted to probe it, he was knocked unconscious and the city faced a blackout.
The energy split. Superman went after one half, while Martian Manhunter went after the other. Superman's struck a genetics lab, entered a computer, then left. J'onn's flew into a funeral home and caused a body to disappear. The two energies returned to their original location and merged. Using the items it had collected, the energy created itself a body. The creature collapsed, and the JLA got it to STAR Labs. Superman used his X-Ray vision on it - the outside was a fully grown man, but his organs were not fully developed. He believed the creature housed the potential energy of an Earth-threatening atomic bomb. Blue Beetle dubbed him "the Weird."
The Weird awakened and began babbling. Batman told him they must take him off world, as he was a thread. Green Lantern encased him, but the Weird simply walked out of the bubble. No matter what the Justice League threw at the Weird, he eluded them.
The Weird arrived at the apartment of who he referred to as "my enemy ... the Jason," Jason Morgan. He then found the family of the man who's body he was using.

Issue The Weird #2
Subtitle Questions
Date May 1988
Writer(s) Jim Starlin
Artist(s) Berni Wrightson, Dan Green
storyline The Weird, now being sought by Superman, showed his "son" what he was and what he could do. He explained that though he may look and sound like his father (and have his memories), he was, in fact, not him. He told the boy about the Jason, and how he'd created a portal for the evil of his society (the macrolatts) to invade the Earth. The Weird was here to protect against the Jason and his ability to open another portal for the macrolatts (he was a zarolatt).
The Weird dropped his "son" off and returned to his quest.
Superman caught up with his prey and gave chase. The Weird tried evading him by becoming intangible, but Superman simply bashed through everything the Weird phased through. Eventually, the inter-dimensional being escaped by causing structural damage to a building - Superman had to stop it from falling. After Superman flew away, the Weird told a reporter that he was unstable and the heroes were afraid he'd blow up half the planet.
The Weird caught up with the Jason, who was attempting to reopen the portal.

Issue The Weird #3
Subtitle Confrontation
Date June 1988
Writer(s) Jim Starlin
Artist(s) Berni Wrightson, Dan Green
storyline The Justice League watched the building where the Weird and the Jason fought. Guy attempted to go in, but the Jason put up a force field around the building. After finally encasing the Weird in a vibrational bubble, the Jason rattled off his backstory and told him how special he was and why he was willing to turn his back on the human race for the macrolatts.
The Jason completed his spell and two macrolatts were unleashed on the Earth. The Weird was able to get himself out of his containment with the Jason in a state of fatigue. The Weird killed Jason Morgan in order to save Earth from more macrolatts. The force field he'd created faded away, showing his dead body to the Justice League. The Weird attempted to explain what had happened to the Justice League.
Superman and Nuklon (of Infinity, Inc.) were taken as host bodies of the macrolatts. The confronted the Justice League, who was preparing to transport the Weird off the planet.

Issue The Weird #4
Subtitle Armageddon
Date July 1988
Writer(s) Jim Starlin
Artist(s) Berni Wrightson, Dan Green
storyline Batman woke the Weird up and ordered him to tell him why Superman and Nuklon were attacking them. After they defeated the Justice League, the macrolatt-possessed began destroying everything near them. The Weird, posing as having come to his senses, offered himself to the macrolatts. When they agreed, he reached inside Superman and Nuklon and pulled his enemies out. He destroyed them and gave himself up to the Justice League.
At STAR Labs, Superman discovered he was just as unstable as he'd ever been. Knowing he only had 2 days before exploding, the Weird asked the heroes for a favor. He began building a boat out of sand off a northeastern coast. Superman brought his son to the Weird. They said their good-byes before Superman and Green Lantern transported the Weird to an uninhabited section of space were he exploded.

Notes, references to time, and chronology:
"This story takes place before Justice League #7" (editorial caption, issue 1)
Captain Atom is participating with the Justice League which would put this during or after issue 7.
Problem: GL (Guy) is himself, which would put this before getting knocked out by Batman in issue 5. Of note, Guy is "gentle" during the Millennium event which takes place after JL: A New Beginning.

   
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