Not a brand new Mafia game, but a new edition of Mafia 2, which will obviously appear in a Definitive Edition, is currently being worked on at 2K Games.
Source: N4G PC Mafia 2: Definitive Edition Listed for PS4 & Xbox One on Korean Rating Board
Not a brand new Mafia game, but a new edition of Mafia 2, which will obviously appear in a Definitive Edition, is currently being worked on at 2K Games.
Source: N4G PC Mafia 2: Definitive Edition Listed for PS4 & Xbox One on Korean Rating Board