Motomu Toriyama called the theme for the game's story "Wish for Rebirth" and explained that the theme has two meanings: one is rebirth of the devastated world, and the other is the re-encounter with Lightning. The wish to rebuild a devastated world may, in part, draw from the feelings in Japan in the aftermath of the 2011 Tōhoku earthquake and tsunami, as Toriyama has alluded to this disaster in an interview, saying: "The past year has seen many disasters - not only in Japan but also across the world. We sincerely hope that the story of Final Fantasy XIII-2 will bring hope and courage to many people’s hearts."
Source: FFwiki
This was, if Im not wrong, from when the game has not been released. But I'm quite sure the story has been finalised by then.
Are you kidding me?

SPOILERS
That chaos apocalyse sure did bring hope and courage to my heart
. Because I know that disasters in the real world won't be so bad if it ended in a Big Crunch apocalypse. And I know that ALL our efforts to rebuild the devastated world will eventually come to waste, and I am fine with that. Oh this game sure brings optimism that the world isn't going to end soon.
/end sarcasm

/end sarcasm
I have always been quite neutral towards this guy, but if he doesn't give a good explanation to such a troll statement, I really have doubts whether he is capable of this job.