Bruce Wayne (Earth-99)

"It's like a wise man once said: Battle not with monsters, lest ye become a monster."

- Bruce Wayne to Kate Kane

Bruce Wayne was the vigilante Batman during his carer. After a lifetime of serving justice, he stated a reign of terror to the point that he lost tracks on the number of people he killed and killed his universe's Superman.

Early life
At some point in his carer as Batman, Bruce Broke his non-lethal code and stated to kill his enemies to the point where he lost tracks of the numbers.

At some point during his reign of terror, he went toe to toe with against friend Superman who he believes gave too much power to the weakest one and their fight ended up with him killing Superman. This battle caused his body to be completely broken to the point where he needed an exoskeleton to walk.

At some point after his reign of terror ended, his cousin Kate Kane took his mantle to success where he failed, but she died trying to save the city.

During the Crisis
Five years after his reign of terror ended, he was visited by two women, one called Kara Danvers, and someone that looked like his late cousin. He discussed with this "Kate" because since Clayface and Jane Doe were unable to pose as her, he had to assume that it was Kate only to find out that it was a doppelgänger from another Earth. During his conversation, Bruce laughed when she told him that he was the "Paragon of Courage" and informed her that in this universe, he was a murderer. During their discussion about how his Kate died trying to be a hero, Kate told him that this time it's the whole multiverse who needed to be saved. In the Batcave, Bruce showed Kate his old suit and told her that he couldn't wear that again and when she tried to talk about the multiverse incoming death, Bruce didn't mind knowing that any world like his deserved to die because there was no hope. Then Kara showed up dressed as a Kryptonian informing Kate to not trust this Bruce since he killed Superman. Bruce then explained that Clark was giving people too much power, so he killed him then he punched Kara revealing Kryptonite inside his exoskeleton. Bruce then argued that his Kate never trusted anyone and even less a Kryptonian. Kate then told him that he would have to kill her too if he wanted to kill Kara. Bruce tried to attack Kara again but this time, Kate pushed him accidentally on an electric which electrocuted him. Before he could die, Bruce told Kate that there was no hope.

Trivia

 * This is the first time Kevin Conroy played a live action adaptation of Bruce Wayne. Conroy was only known to portray the character's voice on animated series.
 * This version of Bruce Wayne shares similarities with various Batmen in all media:
 * Just like Bruce Wayne on Earth-9 in an alternate reality, this Batman went on a killing spree.
 * The version of Bruce as an old man with a metallic exoskeleton is based off the Kingdom Comestoryline.
 * He used to have a non-lethal code which is common to various Batmen in the multiverse.
 * The story of Bruce fighting Superman is reminiscent of The Dark Knight Returns and Batman v Superman: Dawn of Justice where he hates Superman saying yes to anybody and on the movie he hates the idea of an Alien with powers.
 * Bruce owns a similar Batmobile then the one of the Batman of Earth-89.
 * During the Batcave scene, he described Kryptonite to Kara as "A little souvenir from the old home town". Similar to how Gene Hackman's Lex Luthor described it to a weakened Superman in.
 * The wise man Bruce quote is actually Friedrich Nietzsche a German philosopher.