Joker weaponizes Lois's life to create a catastrophe targeting Superman.
Joker kidnaps the pregnant Lois and connects a nuclear weapon to a monitor linked to her heart.
Joker designs the attack specifically to break Superman psychologically.
Joker explains that he was tired of losing to Batman and deliberately targeted Superman instead.
Their long-running opposition motivates Joker's change of strategy.
Joker states that his repeated defeats by Batman motivated him to choose Superman and the Flash as new targets.
The Flash becomes an early casualty of Joker's plan.
The Flash finds the fear-toxin laboratory and is killed by a trap prepared as part of Joker's operation.
Jonathan's death deepens Superman's cycle of grief and retaliation.
Superman keeps Jonathan safe at the Fortress, but an attack causes Jonathan's death and Superman murders him in response.
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