Not exactly the idea I had for Final Fantasy XIII-3, since the 2nd game ended on a cliffhanger ending, but this appears to be a different sequel of sorts.
First of all, only Lightning is playable. You wander through various locations and you have basically save the world in 13 days (game time, that is), you have the option to rewind time, ala Zelda: Majora's Mask.
Apparentely it takes place hundreds of years after the events in FF XIII-2... So I'm curious if they actually acknowledge or address what happened.
[youtube]http://www.youtube.com/watch?v=83vSHt-vEvc[/youtube]
[youtube]http://www.youtube.com/watch?v=B05oiax52xw[/youtube]