1994's Zero Hour: Crisis In Time resulted in a number of temporal anomalies across the DC universe. This led to the introduction of a few new characters that appeared in tie-in issues and the main series. These followed Hal Jordan/Parallax's attempt to reboot DC's timeline and undo the various tragedies experienced by the heroes using stolen chronal energy.

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The timeline-altering DC event not only introduced new characters and teams that spun-off from Zero Hour, but the new timeline also featured quite a few established heroes that were taken up by new characters. Other characters like Guy Gardner were restructured to fit within the new timeline, though not many of these new additions can be found in the current DC universe.

10 Alpha Centurion

Superman fighting Alpha Centurion

One of the temporal disturbances occurred in Metropolis, when Superman found himself in a world without Superman that had found another powerful hero in the form of Alpha Centurion, who first appeared in the pages of Zero Hour.

Alpha Centurian was an ancient Roman warrior who had been taken by an alien race, trained, and outfitted with his powerful armor and weapons before returning years later to become his Metropolis' hero. This version of Alpha Centurion was erased during Zero Hour, though a new mainstream version later appeared.

9 Primal Force

The Primal Force characters banding together

The Leymen were an ancient order of mystical characters who formed to protect Earth, though the majority of their members were killed by Extant during Zero Hour so they couldn't interfere with the pending timeline reboot.

Doctor Mist (as Maltis) was the former leader of the Global Guardians who took it upon himself to form a new group of Leymen as his Primal Force. The group included Red Tornado, Jack O'Lantern, Claw, Meridian, the second Black Condor, Willpower, and a Golem, though they disbanded shortly after forming.

8 Jack Knight/Starman

Starman Jack Knight

Starman was originally a member of the Justice Society of America, who played an important role in Zero Hour as they were brought back from their eternal battle in Ragnarok and reintegrated into the main DC timeline.

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Unfortunately, that resulted in the rapid aging of a number of characters including Starman, who passed his powerful Cosmic Rod on to his oldest son David, though it was his youngest, Jack, who ultimately inherited the role and became one of DC's most popular characters that helped bring about the return of the JSA.

7 Hawkgod

ZERO HOUR CHARACTERS - Hawkgod

The already confusing continuity of Hawkman was made a little worse during the events of Zero Hour, which attempted to clean up the various versions of the character that had appeared before and after the first Crisis by merging the Carter Hall/Katar Hol versions of the character with Hawkwoman.

This created an all-new version of Hawkman that had real wings and was part hawk while also containing memories from both the Carter and Katar versions of the character. This version was eventually revealed as an avatar of a Thanagarian Hawkgod, though that didn't really help clear things up and Hawkman disappeared for a few years.

6 Jared Stevens/Fate

Jared Stevens Fate

Doctor Fate was another casualty of DC's removal of the JSA from active duty following the events of Zero Hour, which resulted in the extreme again of the former hosts of Nabu who were separated from the mystical helmet, cape, and amulet that gave Doctor Fate power.

Jared Stevens was a smuggler hired to collect the mystical artifacts, though he was bonded to them after they were shattered in battle. Stevens became the new Fate and was a snapshot of character designs in the '90s, though only lasted for two failed series before he was killed in JSA to bring about the return of Doctor Fate.

5 Xenobrood

ZERO HOUR CHARACTERS - Xenobrood

DC launched a few new series following the Zero Hour event that were teased during the "Zero Month" that saw every title receive a zero issue to help reorganize things if needed, following the timeline reboot. Xenobrood debuted during the "Zero Month" in their own short-lived title that followed an archeologist's discovery of a mysterious alien artifact that contained four crystals.

Those crystals were lifeforms created by ancient aliens during the Sumerian era as metagene-enhanced laborers that were basically updated genies in a lamp named Zapatak, Blip, Thrasher, and Astra. Xenobrood was canceled after seven issues and thankfully never seen again.

4 Triumph

JUSTICE LEAGUE TASK FORCE - Triumph

Zero Hour's temporal anomalies brought about the "return" of the hero known as Triumph, who revealed that he had been the founder of the Justice League of America who sacrificed himself during their first mission against an invading race of aliens.

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Triumph used his control over the electromagnetic spectrum to overload the alien's weapon which opened a rift in time, trapping Triumph outside of the timestream which corrected itself and removed all memory of the hero. Triumph struggled with his unknown status as a member of the Justice League Task Force, though he ultimately died as a villain of the League.

3 Chase Lawler/Manhunter

ZERO HOUR CHARACTERS - Chase Lawler Manhunter

A new version of DC's Manhunter that seemed to have nothing to do with the legacy hero or robotic creations of the Guardians, as musician Chase Lawler was granted enhanced abilities and limited control of the air after he made a deal with an ancient universal abstract known as the Wild Huntsman to save his girlfriend from shady record execs.

Manhunter attempted to use the Wild Huntsman's curse against villains in Star City, though he lost his abilities and the series was canceled. However, he was killed by a previous Manhunter named Mark Shaw and it was revealed that his origins were really a hallucinatory by-product of the nanites injected into him by the Manhunter Cult, which basically negated his entire series.

2 Extant

Extant threatening all time as Superman and DC heroes attack

Extant was the result of a long-running storyline that began with Armageddon 2001's failed introduction of the mysterious Monarch that led to a hastily changed reveal of Hank Hall/Hawk as the villainous despot from the future. Monarch unleashed the additional chronal abilities and power from the death of his partner Dove to transform into a new villain Extant.

He began to organize an army of time-displaced heroes and villains to take out any threats to his plans to destroy time so that Parallax could rebuild it during Zero Hour. Extant survived the Crisis In Time though he was later hunted down by the JSA and erased from the timeline after his death, which also served to redeem Hank Hall after the character's poor treatment.

1 Bart Allen/Impulse

Impulse Bart Allen

While Bart Allen/Impulse first appeared in the pages of The Flash slightly before the launch of Zero Hour, his arrival from the future and first moments in the present-day were spent fighting alongside DC's heroes during the Zero Hour event while he attempted to locate the Flash.

Impulse first traveled back in the past so Wally West could help cure his accelerated aging with the Speed Force, though he stayed to train and eventually take on new roles as Kid Flash and the Flash before ultimately returning as Impulse during the DC Rebirth era, making Impulse the longest-lasting addition from Zero Hour.

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