Type-0 was originally meant to be FF Agito XIII. Now it doesn't have 'XIII' in the title, so I'm kinda assuming it's no longer part of the whole Fabula Nova Crysallis crap. I also heard that they're doing that with Versus as well. Apparently it's going to be the next numbered title. FF XV.
Apparently.
One thing you might not have noticed is that the logo has changed a bit. It no longer says "XIII." The Fabula Nova Crystallis project was originally announced as Fabula Nova Crystallis Final Fantasy XIII, but the XIII is no longer there, neither in the name nor the logo. The reason for the name change, said Kitase, is that Final Fantasy Agito XIII was changed to Final Fantasy Type-0 but is still a member of the Fabula project, so having a XIII in the project name would have been an issue.
http://andriasang.com/comtou/ffxiii_and_fnc_interviews/