New Mafia game reportedly being developed

Rock Paper Shotgun report that this will make it the fourth installment of the series. Developer Hanger 13's studio head and founder of Mafia 3, Haden Blackman, has just stepped down from his role and been replaced by Nick Baynes, studio head of Hangar 13's Brighton office who according to Kotaku, is leading development on the new Mafia game, codenamed Nero.