Eight months after pulling out of the project in a dispute over money, it looks like Johnny Depp may be back in the fold for “Black Mass,” the long-gestating Whitey Bulger biopic. According to The Hollywood Reporter, Depp, who stepped away from the project when producers balked at his $20 million fee, is reconsidering. That may be because Scott Cooper, whose credits include “Crazy Heart” and “Out of the Furnace,” is the favorite to replace Barry Levinson in the director’s chair. The movie, based on “Black Mass: The True Story of an Unholy Alliance Between the FBI and the Irish Mob,” the fine book by former Globe reporters Dick Lehr and Gerard O’Neill, has been in the works for a while. Initially, Irish director Jim Sheridan was set to direct, and then Levinson was in the picture. It’s one of two movies planned about Bulger, the South Boston gangster who was sentenced in November to two consecutive life terms. Homeboy Ben Affleck is also working on a movie about the mob boss. Terry Winter, of HBO’s “Boardwalk Empire,” is at work on a script, and Matt Damon is apparently on board to play Bulger.