I'm really looking forward to it. I enjoyed XIII-2, even though I hated the story. I'm hoping this time they just throw out the time travel nonsense and get down to telling an interesting but simple story, since it's pretty apparent that they can't handle the complex/trippy/abstract stuff.
Judging from the demo though, Lightning Returns has the most potential of the XIII games as far as gameplay goes. If it's fleshed out and balanced properly, it could be amazing.