This is what I have so far:
"Beautiful Struggle," Talib Kweli
"A Change Is Gonna Come," Ben Sollee (Sam Cooke cover)
"Eyes on the Prize/Hold On," Sweet Honey in the Rock
"Signed, Sealed, Delivered, I'm Yours," Stevie Wonder
"We Shall Not Be Moved," Mavis Staples
"State of the World," Lifesavas
"Pastures of Plenty," Odetta (Woody Guthrie cover)
"People Get Ready," The Blind Boys Of Alabama
"A Change Is Gonna Come," Aretha Franklin (Sam Cooke cover)
"We Shall Not Be Moved," Sweet Honey in the Rock
"The Times They Are A Changin'," Keb' Mo' (Bob Dylan cover)
As you can see, I'm not opposed to repeating a song if the rendition is different. Overall, it seems to be going in the gospel/soul/hiphop direction mostly, so it could either still go that direction or I could make the rest of the songs all different from that.