In The New 52, the primary continuity Owlman, originally depicted as the asylum-bound Boomerang Killer, is retroactively revealed to be still alive, stolen from his parents as a child, and working in the service of the Court of Owls under the name Lincoln March.

[1] Thomas Wayne Jr. / The Boomerang Killer first appeared in World's Finest #223 (June 1974), and was created by Bob Haney and Dick Dillin.

The pre-Crisis Earth-Three Owlman and the Crime Syndicate were killed by the Anti-Monitor's antimatter wave during Crisis on Infinite Earths.

In most mainstream DC universes, Batman's genesis occurred when young Bruce Wayne was witness to the murder of his parents, and was inspired to devote his life to fighting crime.

In the antimatter universe, however, young Bruce was killed along with his mother, while his brother and father survived, with Thomas Jr. growing up to be Owlman.

Equipping himself with a utility belt containing technology and weapons similar to those used by Batman along with possessing a drug-enhanced high intellect (devoted to crime rather than serving the law), Owlman became a master criminal and an ally to Boss Gordon (the antimatter Earth's version of James Gordon) and underboss Lucius Fox.

The working relationship between the two is extremely tense, due to Ultraman's desire to rule the planet through fear and violence clashing with Owlman's more pragmatic desire to allow dissent and rebellion to run rampant (going so far as to funding opposition towards the Syndicate) to provide himself and his allies in the Syndicates enemies to fight.

Ultraman is aware of the affair, but due to Thomas Jr. having undisclosed photographic blackmail material against the villain, he is unable to seek retribution against Owlman for the betrayal.

Thomas Jr. and his antimatter Crime Syndicate allies appeared in the weekly Trinity series, starting with issue #9.

The Syndicate had kidnapped hundreds of innocent people from all 52 realities, including what appeared to be Jimmy Olsen, but was later revealed to be his anti-matter duplicate.

He is a crime lord on Earth-3 and became Owlman after his butler Alfred Pennyworth (who was later responsible for forming the Secret Society of Super Villains) murdered his family.

[5] He is shown to have disdain for his parents due to his mother's abusive nature and his cowardly father killing his patients as a surgical fetish showing no remorse.

[9] After Ultraman and Superwoman are killed in battle during the Darkseid War storyline, Owlman flees using the Mobius chair and ends up on the moon, where Metron trains him.

While the Syndicate battled a team of heroes from various worlds in the multiverse, Owlman talked with John Stewart, who revealed that there had been multiple Owlmen before him.

2) [12] He claims he was Bruce's younger brother, born prematurely as the result of an attempt on Martha Wayne's life by the Court of Owls.

In his false identity as a mayoral candidate, Lincoln March was present at the first attempt on Bruce Wayne's life by one of the Court's Talon assassins.

It is revealed that he survived by taking a dose of the regenerative compound which the Court of Owls used to resurrect their Talons, and had decided to lure Batman to the abandoned building of Willowwood for a final confrontation.

Nevertheless, Bruce confided in Dick Grayson his belief that his parents would have told him if he had a brother, and that the circumstantial evidence he discovered could easily have been used by the Court to convince Lincoln of the authenticity of his "true" identity.

[15] At the conclusion of Batman Eternal when Cluemaster unmasks himself as the person responsible for the recent systematic attacks on Batman and his family, he is about to shoot Bruce in the head when March walks up behind him and slits his throat,[16] revealing that he funded Cluemaster's actions using the resources of the apparently-deceased Court of Owls with the intention of stepping in and killing Bruce, intending to leave his body out in public while March retreats into the shadows, reasoning that Bruce's death at the hands of an unknown foe would forever end the 'myth' of Batman.

He spent years training to bring justice to his family's killers, swearing to follow a code against killing or using the tactics of criminals.

Bullock recognises Owlman as Thomas Wayne Jr. and tries to bargain for his life by revealing that his parents were criminals who worked for Boss Gordon and tried to usurp his empire, killing his son in the process.

After learning the truth, Owlman became nihilistic and renounced his code, dropping Bullock from the top of Wayne Tower to his death.

He is the leader of a murderous vigilante group known as the Talons who hunt criminals in Gotham City, assisted by his gun-toting butler Alfred.

An alternate universe variant of Owlman from a new Earth-3,[broken anchor] based on the pre-Crisis Earth-Three incarnation, appears in 52 Week 52.