That girl worked on Lightning Returns, as did all those other IMDB-named VAs. I think they're just confused. They probably just were told "the next Final Fantasy" and their agents made an assumption, probably. Has happened before.
I doubt they've even started, considering at E3 I was told that the translation team who did the subs for the trailer had to translate it and put the subs on the trailer in a day. I doubt the game has moved so far they're recording English VA in six months.