Deathstroke's History
Injustice: Gods Among Us
In the prime DC universe, Deathstroke is hired by Lex Luthor to free the Joker from Arkham Asylum and plant a trap for Batman when he arrives. Batman manages to detect the bomb in Joker's cell and realizing that the bomb itself is a diversion, reacts in time to deflect Deathstroke's shuriken with his cape, saving an orderly's life as well. Deathstroke compliments Batman's cleverness while brandishing his sword and then attacks Batman. Though his first sword strike is blocked, Deathstroke manages to get a single kick before Batman beats him back, disarming him of his sword and countering every attack Deathstroke tries afterward.
When Batman asks if he's Luthor's pet, Deathstroke replies, "His money's green and as a bonus...I get to kill Batman." With that the two battle in the Asylum, but Deathstroke is ultimately defeated by the Dark Knight.
The main reality of Deathstroke isn't seen again after this.
In the parallel dimension, Deathstroke has lost much of his work because of Superman's imposed peace and has been captured by Cyborg and Raven of this reality and is being tortured by them at Ferris Aircraft. Slade refuses to submit to their torture or accept the regime's amnesty, knowing full of their 're-education' and refuses to become a 'puppet' like them. When he spits at Cyborg, Raven ups the pain of her torture, enough to make even him scream in agony.
Deathstroke is only saved by the unlikely intervention of the recently summoned duplicate Green Lantern, who defeats both Raven and Cyborg. He is freed by Jordan but refuses his help, still believing him to be his world's Lantern. Deathstroke darkly informs Lantern of the possible consequences of his actions and quickly leaves when Jordan is contacted by Wonder Woman, turning his back to Slade and allowing him to slip away unseen.
Deathstroke is next seen meeting with Luthor on a rooftop in Metropolis. He takes a shot at Luthor's baldness, and Lex reveals he finally wants to join the Insurgency. Though Deathstroke says that "Business is bad, being hunted is worse," he admits that he is only joining them because "They made it personal."
Deathstroke is next seen at the beginning of Cyborg's chapter, discussing with Luthor their plan of attack on Superman and referring to Harley Quinn's Joker Clan as pawns. The duplicate Cyborg hears that, and not knowing the truth of the situation, attacks them. Though annoyed that their base has been infiltrated, after Luthor orders him to keep Cyborg busy, Deathstroke responds, "With pleasure." They battle, but Slade is defeated by the duplicate Cyborg.
After Cyborg defeats Luthor and is stopped by his fellow duplicates and the parallel Earth's Batman, Deathstroke observes them as he is filled in on the situation. Though Cyborg and Lantern want to return to their world for reinforcements, Batman informs them of Superman's planned execution of the duplicate Batman. Though fully aware it's a trap, Cyborg comes up with a plan to save their Batman, with Deathstroke telling them they'll need a diversion. Aquaman decides to provide that while Cyborg plans to infiltrate Superman's ranks to gain control of the Watchtower. Deathstroke decides to partner up with Cyborg, who is less than enthusiastic about such a team up, though Luthor and Batman insist, with Deathstroke settling the matter by saying, "I'm not asking permission."
The two break into the Hall of Justice, with Slade annoyed by Cyborg's reiteration of their plan. Though Deathstroke attempts to ease the tension between them by claiming they have no history unlike their counterparts, Cyborg reveals he knows of his history with this world's Titans, having been paid to kill them, quoting Deathstroke, "only a couple times". Cyborg makes it clear they're not friends and tells Deathstroke to meet him at the teleporter.
Deathstroke arrives at the teleporters and sees Cyborg has defeated his counterpart and admits to the duplicate Cyborg on how his counterpart tortured him. The two use the teleporter to arrive in the Watchtower. Cyborg quickly gains control of the teleporter in the Watchtower, which surprises Slade, though Cyborg reveals he gained his counterpart's access codes earlier.
Deathstroke then makes his way into the Watchtower, planting some explosive traps while the Flash and Shazam converse. When the Flash realizes something is amiss, Deathstroke makes himself known and activates the explosives to temporarily knock Flash out before confronting Shazam. Slade defeats Shazam through a combination of his greater experience and from weakening Shazam with the explosive. Calling Billy a kid, Deathstroke makes his way to the Watchtower's core reactor. Gazing on the reactor and grinning fiercely, Deathstroke declares darkly, "It's payback time."
Deathstroke then overrides the reactor and sets it to explode. The Flash tries to stop him but is defeated by him. Staring at the Flash's unconscious body, Deathstroke tells him, "Finale's comin', and you've got a front-row seat."
Slade returns to Cyborg, who is outraged when he realizes what Deathstroke has done. Slade cooly argues that the Watchtower is the key to Superman's regime and urges Cyborg to leave with him. Cyborg says he's jeopardized the mission, but Deathstroke makes it clear "Superman's my priority. Not your Batman."
Cyborg is contacted by Luthor who reveals he has found a replacement part for the kryptonite weapon at Ferris Aircraft and needs Deathstroke to get it. After hearing Luthor's plan to use the weapon so Batman doesn't risk his own life wielding it, Deathstroke asks for the coordinates.
Deathstroke arrives at Ferris and overhears Wonder Woman and Killer Frost discussing the possible location of the Insurgency's home base. When Killer Frost looks away for a moment, Deathstroke binds Wonder Woman with her own Lasso of Truth before confronting Killer Frost. He compliments her work but informs her she's too late. They battle and Deathstroke easily defeats her, calling her tactics "One-dimensional." He turns his attention to Wonder Woman as she frees herself, losing one of his handguns when he attempts to shoot her. Wonder Woman reminds Slade he was offered amnesty and tells him he should have taken it. Deathstroke, however, retorts, "And miss my chance to battle Superman's rebound girl?"
Insulted, Wonder Woman reminds him she is an Amazon but Deathstroke easily blocks her first attacks and calls the Amazons, "an obsolete race with predictable techniques," and shoves her aside, bidding her to give him a real challenge, with "Impress me." Mercenary and Amazon battle, but Deathstroke emerges the victor due to his understanding of her battle techniques. Unimpressed, Deathstroke leaves and finds the part Luthor needed, informing him of his success.
Deathstroke is not seen again after this, having delivered the weapon off-screen.
