Michael Mann has given moviegoers a number of notable films over the years, including The Last of the Mohicans, The Insider and Ali. But the film that has arguably become his most influential work is Heat, the 1995 crime thriller starring Al Pacino, Robert De Niro and Val Kilmer. While film told a relatively finite story, Mann expressed interest in expanding upon it with a prequel novel under his Michael Mann Books banner. Not much has been said about the project in the past few years but, now, the veteran director has provided an update.
Article source: https://www.cinemablend.com/news/2496428/michael-mann-gives-an-update-on-the-status-of-the-heat-prequel