As far as I can search, there's only one track, thought you're correct in saying it's three tracks, since it's probably mixing the three to create one soundtrack. Here's my split on it:
0:00 - 0:17 -> An ambient piece, a redo of The Thirteenth Day, if you call it. Vocals, adding an eerie nature.
0:18 - 0:52 -> Piano and orchestra; FFXIII-2's answer to The Promise? Still sounds nice.
0:52 - 2:00 -> Potential battle theme, certainly is upbeat enough to be one.
Hope it helps out, and I hope it'll get confirmed quick who the composer is. :D
