Name: Composite Superman
Universe: Earth-1
Alter Ego: Joseph Meach
Occupation: Caretaker of the Superman Museum
Marital Status: Single
Group Affiliation: None
Base of Operations: City of Metropolis
Known Relatives: None
Height: 6 ft. 1 in.
Weight: 201 lbs.
Hair Color: Brown
Eye Color: Brown
First Appearance: World's Finest Comics #142

History:
Determined to become famous but a failure at everything he tried, Joe Meach was saved from certain death by Superman, who then got Meach a job as caretaker of the Superman Museum. Working in the shadow of the Man of Steel day after day, Meach grew to resent him. One afternoon, as Meach was standing in front of a display the featured statuettes of members of the Legion of Super-Heroes, a stray bolt of lightning struck the statuettes and Meach suddenly felt himself possessed of extraordinary power. Apparently the 30th Century duplicator machine that had been used to create the Legionnaire statuettes had also imbued each statuette with a portion of that Legionnaire's super-powers.

Convinced that Superman had humiliated him by making him a lowly sweeper, Meach decided to gain his revenge by humiliating Superman and Batman before the world. Using the shape-shifting powers of Chameleon Boy, Meach transformed himself into the Composite Superman, a green-skinned figure wearing a half-Superman/half-Batman costume.

With his vast array of super-powers the Composite Superman was easily able to accomplish his ends, humiliating the World's Finest duo in public again and again, learning their secret identities, and threatening to reveal those identities to the world unless Superman and Batman retired from public life permanently. Unable to defeat the Composite Superman, the two heroes were on the verge of surrendering to his wishes when the Composite Superman's power-charge wore off, leaving him plain Joe Meach again, with no knowledge of what he had been and done.

Months later an alien named Xan, seeking to avenge the death of his space-pirate father, who had been captured and imprisoned by Superman and Batman, secretly duplicated the lightning accident that had first affected Meach and transformed him once more into the Composite Superman. Again, the composite criminal was on the verge of defeating the World's Finest heroes when his power-charge wore off and he became Joe Meach once more, but this time Meach, learning how he had been used, sacrificed his life to save Superman and Batman from Xan's vengeance.

To prevent the Composite Superman from ever coming into being again, Superman used his heat vision to melt the Legionnaire statuettes into slag. Unfortunately, Xan, escaping from prison months later, traveled back to a time before the statuettes had been destroyed and duplicated the lightning strike, giving himself the powers of the Composite Superman. Xan soon abandoned his Composite Superman guise to become the super-villain known as Amalgamax, but unlike his predecessor, he was finally outsmarted by Superman and Batman, with the aid of the Legion of Super-Heroes, and returned to prison when his super-powers wore off.

Powers:
When fully charged, the Composite Superman duplicates the powers of the following Legionnaires: Brainiac 5, Chameleon Boy, Bouncing Boy, Colossal Boy, Cosmic Boy, Elastic Lad, Element Lad, Invisible Kid, Lightning Lad, Matter-Eater Lad, Mon-El, Light Lass, Phantom Girl, Shrinking Violet, Star Boy, Sun Boy, Supergirl, Saturn Girl, and Triplicate Girl. The duration of these powers is of unspecified but limited length, depending on the intensity of the lightning strike that affects the statuettes.

While possessing these powers the Composite Superman is an extraordinary athlete and superior hand-to-hand combatant. Plain Joe Meach is neither of those things.