I know it's not much, but at least there's something to go on after last week's announcement of Lightning Returns: Final Fantasy XIII. The game is due out next year, and brings with it a new gameplay system, world and characters.
Here's three pieces of concept art, with my favorite being the rundown on the Red Dragon Monster. The second bullet point on this image tells us that "The Dragon is strong." I bet he is.
There's also a new webpage for the game, though you won't find much there yet. The website promises that we'll find out more on this game on September 4 -- today. Stay tuned.