I doubt she’ll die, sadly. Just because we can actually choose to support her now and it’d probably feel bad if she was killed off.
My vote goes to at least exile or imprisonment. Definitely will not be Warchief anymore. Could still be a future player in the story that way, but totally banished from the Horde and the forsaken. Some kind of punishment needs to happen to her.
Or she and Anduin declare their love and run away together. There’s that option too.