Yeah, I seriously wouldn't be surprised if they just renamed Versus XIII into FFXV. I mean they renamed Agito and even though the director says its because it became something different from the FNC, it still utilizes many of the FNCs mythos like l'Cie (which is a major plot element) and I believe the Goddess/Gods named in the FNC mythos. Versus XIII's only connection to the FNC was Etro, and she wasn't even mentioned by name in XIII.