Tbh, I was surprised to hear it as "remake", as I'd easily believe a remaster instead.
But as 8ther said, it makes sense to maybe push the FF9 world/Gaia into the list of "expanded FF worlds" status after the long success of FF7 and partial success of FF15 (and somewhat "failed" attempts of FF12 and 13? Altho FF15 is kinda related to FF13...?). The Netflix show does seem to be a signal that S-E wants to make money from FF9. A new, actual remake would fit that plan perfectly.