The character will be depicted as the "sharp-tongued rogue" from the Fable universe, who has been part of the comic series since issue one and has had his own spinoff comic series, Jack of Fables.
Telltale released two teaser screenshots to accompany its announcement: one showing Jack engaging with protagonist Bigby (above), and one showing Bigby confronting a yet-to-be-announced character in a seedy nightclub.
The Wolf Among Us is a series based on the Fable comics. The Wolf Among Us: Faith, launched on Oct. 11 this year for PlayStation 3, Mac, Windows PC and Xbox 360. Polygon's review of the first episode in the series can be read here.