This week's Famitsu had an interview with Toriyama:
-XIII-2's development progressed more according to plan than XIII.
-Toriyama is happy that the gameplay systems are being well received.
-The game originally had a system where you could strengthen your accessories, but this made your character too strong, so they got rid of it.
-As detailed earlier, the game will see series bosses for coliseum mode outside of the Omega download that kicked off DLC.
-Lightning will appear in the game as a coliseum opponent download. Defeat her, and you can make her into a party member. Her role is blaster.
-They hope to continue releasing download content through May.
-The DLC will include things outside of the coliseum battles -- episodes, for instance.
-Outside of download content, the game will have updates which will add new support functionality for those digging deep into the game.
-Toriyama said that they'd like to use Sazh, his son Dajh and interdimensional traveling merchant Chocholina in some capacity, either through novels or DLC.

"Lightning's DLC goes beyond just the character data. Square Enix also plans on releasing secret story episodes for the character.

Outside of Lightning, FF fans can look forward to classic Final Fantasy series bosses for the coliseum battle mode.

These revelations come from what appears to be a general interview with reps from Square Enix's 1st Production Department (I'm not sure who the reps are, but XIII-2 interviews are usually with Motomu Toriyama and Yoshinori Kitase). The interview also reveals that Square Enix is hoping to expand the XIII-2 story outside of just DLC, with novels and so-forth. They hope to include Sazh and his son and the Chocolina character in DLC or novels. Noting that the Japanese market is changing greatly, they say that they'd like to consider a variety of things for future developments.

There's one bit about Final Fantasy X HD in the interview. The staff says that it will be a bit longer before we get screenshots. However, they hope to not take too long in releasing the game."

http://andriasang.com/comzqz/ffxiii2_lightning_dlc/