But it's not what you think! Rather than another full entry in the Fabula Nova Crystallis anthology, Episode Zero is a set of stories that lead up to the events of FF13, to be released online seperately and likely in a physical form at a later date.
Now residing within the "Special" section of the Final Fantasy XIII official website, the story - full title Episode Zero: Promise - is to be penned by Jun Eishima, who has worked on the FF series in the past.
The first episode of the story is to be titled "Encounter" and will be available to read online soon. Square Enix declined to comment to UFFSite on the possibility of an English translation and release of the stories.