I'm guessing they were considering making the next online game as part of the Fabula Nova Crystalis series, but decided to make it FFXIV instead.

That's of course just one theory, but I guess it would make more sense to keep it separate, since there's supposed to be certain elements of familiarity closely related to FFXI.

The FNC game I'm really hoping for is a brand new DS game made in the style of the originals, or at least their remakes on the GBA/WSC/DS.