Word of the appearance of an unexpected Bat-villain has arisen — particularly, a character last seen in Batman, Inc.#5. September 4, 2013 will bring Batman #23.1: The Joker to shelves, and thus, an appearance by the character Jackanapes is imminent.
While at a zoo, the Joker will have a flashback to a childhood memory that will trigger his need to take Jackanapes under his wing. It is here that Joker will take on a new, twisted role: that of a mentor. But why is he training Jackanapes to be a villain? What use will he have for him?
Additionally, Jackanapes will appear in the upcoming Damian: Son of Batman miniseries.
Source: DC Comics Blog