Joker (New Earth-Two)

Origins?
Joker has made up multiple stories about how he became who The Joker. All of them pretty much end up ending with him becoming the Red Hood and eventually being pushed into a vat of chemicals by Batman. These are his most popular: Joker has claimed that he truly does not know what he was before the night he became the Joker, except that he was the Red Hood and that he preferred his original "origins" then what the real one would be.
 * 1) Being a struggling stand-up comedian, who owed money to some Gotham gangsters, who forced him to don the identity of the Red Hood in order to perpetrate a heist of chemicals at Ace Chemicals.
 * 2) A chemist who was laid off by Ace Chemicals, who decided to hire thugs to trash the factory and dons the identity of the Red Hood to hide his real identity.
 * 3) He was once known as "Jack" who was a regular joe, who was attacked by Batman in the street, which left his face scarred and forced him to don the mantle of Red Hood in order to stop Batman from doing what he did to others. He attempted to defeat Batman at Ace Chemicals during the latter's attempted robbery, but was pushed into a vat of chemicals when he was about to defeat the villain.
 * 4) He was once a family man named, "Johnny", who had to support his his pregnant wife via gambling, which lead to him owed money to most of Gotham's loan sharks. In order to pay his debts he was forced to do a job for the main loan shark, who had him break in and "rob" Ace Chemicals in order to get the insurance money.
 * 5) A random drifter, who was bored and decided to steal from Ace Chemicals just for the Hell of it.