'Riddick 4'  is an upcoming action adventure sci-fi thriller film. It is directed by David Twohy and written by David Twohy, Jim Wheat and Ken Wheat. Vin Diesel is the executive producer of this film. It is the sequel of Riddick and the fourth live-action movie installment in the Riddick universe. The long-delayed fourth chapter of the Riddick saga is finally on the way. ...