Hey hey hey
I don't think Ariana Kane is the Chosen One (this is definitely Syd !), but I think this is no accident if her name is encoded in the theme while we are talking again about the Alliance.
So, I checked on ABC's website to look in the summaries if there was something interesting about her. When Jack was investigating on Breo, he discovered that Ariana Kane had had an affair with him, so she was the one who was trying to drive Sloane crazy, remember ? But he needed Irana's help to figure it out, and Irina had got access to the Information Resources of the Alliance ! She had done the same to get into the Echelon network and retrieve information about the Rambaldi artefacts. She may have done the same to retrieve some intel about the Horizon.
Now, is Agent Kane still involved in that ? Don't know... Maybe that was just an hint about Irina's quest of the Horizon... Or maybe she's the one who runs Prophet 5... And maybe she is another Derevko sister ! LOL !