Square-Enix shocked the world when an exclusive demo of FFXIII was packaged in the Japanese “Complete” release of Advent Children. Originally it was thought that this would be a “Japan Only” for quite some time, but now there’s talk of a possible North American release.
Squeenix said that it would include an “Exclusive preview of Final Fantasy XIII” in copies of Advent Children in North America. Speculation has ran wild on whether or not it’s an actual demo, or just more exclusive videos. Should we get our hopes up?
Source: Final Fantasy Union

I will buy Advent Children Again if it has this demo.
I will buy it for a first time…if it has the demo. I bought Crackdown for the Halo 3 beta lol.
I bought ZOE for the MGS2 demo, and played the demo for 30 hours. I also bought Brave Fencer Mushasi partly for the FF8 demo, but ended up liking Mushashi more in the longrun!
Ah demo memories…Now you have to buy movies to get them!
I just want to play this game! I’ve got to get a PS3 first though…
A great ploy to get people to buy some more advent children merchandise. So good I may even buy it. If it comes to Europe :/
I really hope it is indeed the demo…that would be amazing!
Is Advent Children Complete even coming to the U.S.?
Havent played a FF game before, maybe this will be my first one if I can get a demo. =)