As the title. First of all, we should remove any reference to Three Jokers, which is confirmed to have never been canon even after the release of Joker: Year One (Three Jokers refers to The Killing Joke, and The Killing Joke is partially de-canonized by Zero Year, where a completely different Red Hood Gang is shown and a different origin for the Joker, later confirmed in Joker: Year One). We should also add the events of Joker: Year One and all subsequent sagas. The page is not complete and must be constantly updated.