Beyonce IS Etta James. Mos Def IS Chuck Berry. Adrien Brody IS Leonard Chess. If that last one made you say "Who?", then hit the books. Chess Records (pretty much ground zero for rock n roll) will be immortalized on film in the upcoming Cadillac Records.
In addition to those listed above, the film will include other real-life peeps/legends like Muddy Waters (Jeffrey Wright), Little Walter (Columbus Short), Howlin' Wolf (Eamonn Walker) and Willie Dixon (Cedric the Entertainer). Their Eyes Were Watching God's Darnell Martin is directing.
How about a movie about Stax Records? Or Sub Pop? Seriously, think about it Hollywood.