Would Forest Whitaker make a good Martin Luther? The actor is currently in talks to play the role of Martin Luther King in a forthcoming movie Memphis.
Memphis is a documentary style film which was written by Paul Greengrass which has been described as his 'passion project'. Greengrass who also directed 'The Bourne Ultimatum' is set to direct this film as well. Memphis will follow the story of Martin Luther in the lead up to his assassination.
The documentary has been in the pipeline since 2010 but fell through when Universal backed out due to financing and scheduling issues. It has since been picked up Veritas and Wild Bunch. So it looks like the wheels are in motion again.