I think she is confirmed by datamining. Someone even did unlock her in a mod.
Datamining should never be fully assumed at face value, though. Things are prototyped and scrapped throughout game development all the time. There are plenty of times where datamined info has just never appeared in the actual game in other IPs (and Larian games) before, and sometimes remnant files even remain in full release (like some areas, models and more in WoW for example). So at best what Tuco said is right, in that the idea has been played with at some point. But it's by no means a guarantee that it'll ever see the light of day.
