I knew about this awhile ago (from a friend of Natascia Diaz...)
Diaz was offered this production but turned it down because, at the time she would have had to commit, she was in the final callback stages for Diana in the "Chorus Line" revival, and she wanted to keep her options open for that. Unfortunately, she didnt end up getting the role...
Tonya Pinkins: Then we had a "Lot's Wife" last June that was my personal favorite. I'm still trying to get them to let me sing it at some performance where we get to sing an excerpt that's gone.
Tony Kushner: You can sing it at my funeral.