In Batman's case a very vivid hallucination of Joker appeared that represented the embodiment of his worst fears and darkest desires along with Scarecrow Nightmares and flashbacks to Joker's past crimes.
The game Batman: Arkham Knight opens with the Joker's body being cremated after his death in Arkham City. Fans of the game who played more than once know that there's a secret scene where, when the player begins New Game +, the opening scene of Joker's cremation changes.
In Arkham Knight is the Joker just Batman hallucinating, or is it really the Joker's ghost? Yes, a lot of evidence points to the former, but the Joker shows things that Batman knew about but didn't actually see firsthand, like Barbara being crippled.
Originally Answered: How did the Joker die in Batman: Arkham City? Well, let's see. First of all, Joker lured Batman to the Sionis Steel Mill and faked his death, so that Clayface, disguised as Joker, could jump Bats from behind, allowing Harley to knock him out and then poison him with his blood.
Though he never voiced it, Batman did privately admit that he didn't go searching for Jason because he was afraid of what he would find. He knew Jason was killing people, and Batman couldn't live with the shame of knowing that he had unintentionally created a deadlier version of Joe Chill.
After Batman revealed that he was going to give the cure to the Joker even after all his horrible acts, Joker started laughing at the irony before succumbing to his disease and died as his arch-nemesis watched.
In Batman's case a very vivid hallucination of Joker appeared that represented the embodiment of his worst fears and darkest desires along with Scarecrow Nightmares and flashbacks to Joker's past crimes.
A flashback reveals that before the Joker died, his infected blood was used in blood transfusions, infecting five people including Batman; Batman, concealing his infection from others, imprisoned the four other recipients who were physically and mentally transforming into the Joker.
Why is the Joker in Batman's Head in Arkham Knight?
He's got Joker's blood in him, and when in Ace chemicals Batman inhaled some toxin which caused him to see what he would be like if the Joker took over (cuz of the blood).
Everything seems to be going swimmingly until Arthur lets himself into Sophie's apartment after his mother's death, and she barely recognizes him. Viewers then see alternate versions of Sophie's scenes where Arthur is interacting with thin air, clearly indicating that the entire relationship was a fabrication.
Later, Arthur goes to Arkham State Hospital and steals his mother's records, and finds out that he was in fact adopted, and that Thomas Wayne is not his father and that Penny is not his true mother.
Following the 1986 multi-title event Crisis on Infinite Earths reboot, the character's origin story is expanded on in Batman Annual #19 and the miniseries Batman/Scarecrow: Year One, with this narrative also revealing that Crane has a fear of bats.
However, neither of these theories proved to be the reason that Batman was alive and well at the start of the game's events. Your browser does not support the video tag. Suicide Squad: Kill the Justice League reveals that Bruce Wayne did in fact, survive Arkham Knight's ending.
Around this time, he also snuck into Arkham City and had a run in with the Joker. Mockingly adopting Harley Quinn's moniker for him, Jason picked the alias "Arkham Knight", and knew that, based on the Arkham Asylum and Arkham City Incidents, it would haunt Batman once he revealed himself.
The Joker evades Batman, Captain America, Bucky Barnes, and Robin and delivers it to the Red Skull, but is horrified to learn that the Red Skull is a Nazi as he sees himself as an "American criminal lunatic!" When the Red Skull threatens to drop the bomb on Washington, D.C., the Joker fights him until Captain America ...
When under the influence of the toxin in Arkham Asylum, Batman's eyes glowed orange which was a nod to the color of the chemical. In Arkham Knight they instead glowed green which alluded to Joker's infected DNA in his blood.
Bruce's blood type is AB-. He helped Kate and Maggie with their wedding and got Wonder Woman to officiate it. He wore pastels to it. A young Bruce Wayne found coal in his stocking one year.
The psychopathology Arthur exhibits is unclear, preventing diagnosis of psychotic disorder or schizophrenia; the unusual combination of symptoms suggests a complex mix of features of certain personality traits, namely psychopathy and narcissism (he meets DSM-5 criteria for narcissistic personality disorder).
Pseudobulbar affect (PBA), or emotional incontinence, is a type of neurological disorder characterized by uncontrollable episodes of crying or laughing. PBA occurs secondary to a neurologic disorder or brain injury.
However, seeing Batman's twisted and bloodied corpse has the Joker's stomach churning, and it's causing his world to come crashing down around him. With Batman dead, the Joker is realizing just what the Dark Knight means to him and how empty his life is without his enemy.
