Veteran screenwriter could take over franchise from departed Jon Favreau. By Eric Ditzian Shane Black Photo: SGranitz/WireImage One week after news first broke that Shane Black was a top candidate to helm “Iron Man 3” in the wake of Jon Favreau ‘s departure from the franchise, another report suggests the director is now in final negotiations to win the job. Deadline reports that Black is essentially set to direct Robert Downey Jr. in the third “Iron Man” flick but that it’s unclear whether he’ll also pen the script. “That’s not figured out,” an unnamed source told the website. A rep handling the film declined to comment, while Black’s rep hadn’t returned MTV News’ requests for comment by press time. Black only has one directorial credit on his r
