With Michael Mann having officially relinquished the James Dean biopic, Warner Bros. is now salivating over the film he’s prepping for an early 1995 shoot. The project will allow director Mann to bring together onscreen for the first time two of the top New York Oscar-winning actors, Robert De Niro and Al Pacino.The project is an untitled drama penned by Mann that sources described as a sweeping crime saga to be set in either Chicago or New York, featuring the two stars as adversaries. De Niro and Pacino both appeared in “The Godfather: Part II,” but because De Niro played a young Don Corleone and Pacino played Corleone’s son, Michael, the two never had the chance to be seen together. By the tentative start date, De Niro will be finished starring in Martin Scorsese’s “Casino,” and Pacino should have completed playing Panamanian strongman Gen. Manuel Noriega for Oliver Stone. That film starts shooting in late summer or early fall.