For a bio to really work, we have to learn something we didn't already know or at least have a different POV. We know the Whitney Houston public story.
But what about her relationships with women? Robin and others...? After disasterously telling Robin she has to move out of the house because Whitney has to appear straight, we could get I Will Always Love You solo in a pin spot, and we would know all that follows is downhill and ending in tragedy. We don't have to see it.
Of course the Houston estate wouldn't like this story line very much.
The Whitney Houston Story, as has been pointed out, is just The Judy Garland Story all over again. Ho hum.
"If my life weren't funny, it would just be true. And that would be unacceptable."
--Carrie Fisher