Hank Hall is a fictional character in the DC Comics universe who first appeared in Showcase #75 as Hawk of Hawk and Dove. He later became the supervillain Monarch in the crossover event limited series Armageddon 2001. He later became known as Extant, and appeared in the Zero Hour limited series (as well as some related tie-ins). Eventually, the timelines that led to Hawk's transformation first into Monarch and then Extant were erased. Hawk was restored, and in the final issue of Blackest Night, he was finally returned to life.
Hank Hall was originally the superhero Hawk, of Hawk and Dove. Hawk represented "chaos", while Dove represented "order". His brother, Don Hall, the original Dove, died during Crisis on Infinite Earths. Don was replaced with Dawn Granger, who mysteriously acquired her powers in London.
In response to fan-criticism of Armageddon 2001, many of whose readers felt that the character of Hawk had been severely misused in the story's last-minute changes , DC Comics set about restoring the character as he had originally been intended; a hero. DC had already retconned Extant's portion of Hank Hall's timeline in issue 14 of JSA, dated September 2000, in which Metron announced his intention to erase the villain's "wretched timeline" with his Mobius Chair. This was the second issue of a 3-part story entitled The Hunt for Extant!. After this, DC also retconned Monarch's portion of Hall's timeline with the final issue of the 6-part miniseries The Battle for Blüdhaven, dated September 2006, which now depicted Captain Atom's transformation into Monarch, as had been DC's original intention back in 1991. Hawk was restored, but he would not be revived until the final issue of Blackest Night.