Yes...We already know that FFXIII has three Version: FFXIII, FFVersusXIII, and
FFAgitoXIII.
But did you know they might make an FFXIII spin-off for the DS?
source- http://dsrevolution.com/article.php?articleid=1421

So not only is FFIII and FFCrystal Chronicles is coming to DS, but this too!
If it's true....I will be vey happy.

I made an Title for it too.....Final Fantasy Duel Swords XIII