The magazine's sources claim the festival, which kicks off on April 11, would be the start of several reunion appearances that would run throughout the year.
Billboard's sources say there have been "some conversations" between Big Boi and Andre 3000, while another says it's "all systems go." Reps for OutKast did not immediately respond to Rolling Stone for comment.
See where Outkast's 'Stankonia' ranks on our list of the 500 greatest albums of all time
The duo has largely been inactive since the 2006 release of "Idlewild." Since then, Big Boi has put out two solo albums -- 2010's "Sir Lucious Left Foot: The Son of Chico Dusty" and 2012's "Vicious Lies and Dangerous Rumors" -- while Andre 3000 contributed to singles by other artists and recently portrayed Jimi Hendrix in the biopic "All Is By My Side."
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