There is a huge difference in singing a couple of songs with that scary range and singing the entire score without a break (other than the intended intermission).
It's an endurance test, not a capabilities test. If she could rest in between songs or sing something not nearly as demanding, sure.
But that's not how Evita was written.
"Jaws is the Citizen Kane of movies."
blocked: logan2, Diamonds3, Hamilton22
And it won't, because she won't. More's the pity, though... that idea someone posted of the three Evitas mirrors what Hal Prince wanted to do and later discarded the concept of: three actresses playing Eva at different phases of her life. It would be interesting to use that concept and pull it off with the stars.