Batman finally discovers the Joker's real name Thus, the Joker's real name is none other than Jack Oswald White; however, the story about the discovery of his identity has a storyline.
Batman and Joker definitely aren't brothers in the comics. While the Joker movie plays very deeply with this idea, it still maintains the same stance. In the books, Joker's origin story has been a mystery. Readers have come across multiple different ones over the years.
Because he knew Batman would go for Rachel and it would hurt that much more that she ultimately was killed. He just played a "joke" on him...that's all. Joker has no idea who Batman is and by the way the movie played out, doesn't want to now.
Martha reveals that she forced Psycho-Pirate, a villain capable of knowing all of DC's timelines, to tell her everything she knew about the main DC. It is at this point that Psycho-Pirate revealed that the Joker's real name is Jack Oswald White.
Batman Knows Who The Joker Really Is, So Why Doesn't He Tell Him?
Is Arthur actually Thomas Wayne's son?
According to Penny, Arthur was born of an affair she had with Thomas when she worked for him. She said in a flashback that Thomas' wealth, power, and influence helped to produce the claim and paperwork that Arthur was adopted.
Think of all the extra fun and games that would come from torturing Bruce Wayne as well as Batman. Thinking practically (if Joker is capable of doing so), the villain may not want Batman's identity revealed because it could mean the end of the superhero's career, and Joker losing his best enemy.
Batman's real identity was a bigger obstacle to the Joker than he probably expected, as making it public would have ruined the twisted fun he was having with the Dark Knight, and to him, what was important was creating chaos and messing with Batman, not knowing who he really was.
In the DC Universe continuity, Batman is the alias of Bruce Wayne, a wealthy American playboy, philanthropist, and industrialist who resides in Gotham City.
Image via Warner Bros. Key to Arthur's spiral is new information he learns from his mother Penny (Frances Conroy), with whom he lives. Arthur finds a letter Penny has written to Thomas Wayne, claiming that Wayne is Arthur's real father.
In the final version of the film however, Jack Napier takes Chill's role as Thomas and Martha Wayne's killer while Chill, according to producer Michael Uslan, became one of Napier's men who accompanied him in mugging the Waynes, was credited as "Other Mugger", and portrayed by Clyde Gatell.
In the process, he begins the training that shapes his destiny as a feared vigilante, known as Batman. In Pennyworth, Bruce is revealed to have had an older sister, Samantha, who disappeared long before he was born.
While it's not a perspective fans are used to seeing, it's a fascinating look at a Batman who is more vigilante than superhero, and whose hatred for Joker isn't rooted in awestruck disbelief at his depravity, but frustration at having to lose another night of his crusade to a villainous clown.
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).
Finally, as far as television is concerned, in Season 5 of Gotham, Bane was introduced with the real name of Eduardo Dorrance, and with a background that combines his history in the comics with his role in The Dark Knight Rises.
DC Comics have generally made one man responsible for killing Bruce Wayne's parents, a common criminal named Joe Chill. Small-time mugger Joe Chill first appeared in Detective Comics #33 in 1939 and was created by Bob Kane.
While Harley Quinn discovered Batman's secret identity long after the Joker involuntarily learned the truth, DC's first Harley Quinn found out Batman was actually Bruce Wayne decades before either of them–and did so after her first time meeting the Caped Crusader.
Joker is obsessed with Batman because he believes the two of them are exactly the same that “one bad day” is what turned them into what they are, and Joker wants Batman to believe deep down he's just like him.
The Joker didn't want Batman's identity for any reason but as a way to say that he has beat the system. He threatened to kill people in order to get Batman to do what he wanted to. If he could do that, he would prove that chaos beats order.
Following her introduction to the comics in 1999, Harley Quinn was depicted as the sidekick and lover of the Joker as well as the criminal associate and best friend of Poison Ivy.
Wayne violently asserts that he is not Arthur's father as soon as Arthur introduces himself, and point-blank tells Arthur that he was adopted and that Penny Fleck had been committed because of her delusional belief there was something between her and Wayne.
Conclusion: Penny did in fact have an affair with Thomas Wayne however they made her sign an adoption form for her own child to cover it up. We know she signed papers and we now know she did have an affair with Thomas Wayne.
