http://www.hollywood-elsewhere.com/2013/10/light-that-failed/
Greengrass told me at the after-party for the recent Captain Phillips premiere in Los Angeles. Greengrass had cast an Atlanta-based preacher — apparently an eloquent speech-giver and sermonizer — to play King in Memphis, but the poor guy passed away “three or four months ago,” a friend confides. Greengrass was dispirited by this loss (he didn’t want to go into it during our chat but it was clearly a sore subject for him) and apparently lost his directorial mojo as a result.
Rumor since Wells can't find the name, and FWHIT was attached in May.