I don't believe Janet would consider a biopic until she is just about dead and gone - doesn't seem to be her "style". BUT...if she IS considering it anytime in the next 2-4 years, I would certainly be open to Halle being a strong contender for the role. As a fan of them both, that would be interesting.

To my disappointment, I don't think there will be very much Janet in the upcoming MJ biopic as I'm not sure about the relationship between her and the estate so the script may have been finalized in a way that minimizes her part in his actual life.