While the superstar, 54, will not be participating in the film, a source tells OK! she does plan to break her silence — on her own terms.
"The word is Janet wants to set the record straight and give one interview that addresses all the big mysteries she keeps getting asked about," says the source, noting that it could be one of the most revealing Hollywood tell-alls ever.
"Janet's achieved success and stardom that's surpassed her wildest dreams, but until now, she's gone out of her way to keep her private life under wraps," the source continues. "This will put an end to certain myths and untruths while hopefully inspiring a few people along the way."
Nothing will be off-limits. According to the source, Jackson intends to talk about her special bond with her late brother Michael, who passed away in 2009.
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"She wants to reiterate what a gentle soul he was," says the source, noting that Jackson won't shy away from discussing her "roller-coaster relationship" with other relatives. (After Michael's death, the Jacksons found themselves in a bitter family feud over the King of Pop's will and estate.)
However, her Super Bowl wardrobe malfunction still promises to be front and center.
"Of course, Janet isn't too happy about having the whole 'Nipplegate' fiasco dredged up again. But she wants to get her version out from her own lips, not via third parties," says the source, adding that the "Scream" singer will likely go out of her way to voice her forgiveness towards Timberlake, 40, who recently apologized for the way he handled the incident.
"She believes Justin was sincere," adds the source. "But as with all the other topics, Janet plans on leaving no stone unturned and will likely disclose some tough truths."