I was browsing the latest news on adventchildren.net since I haven't been up-to-date with it lately when I came across the post when they mentioned that AC's image song would be Himuro Kyousuke's CALLING. I downloaded the song a couple of days ago and even though I have no clue what he's saying, I love it xD
I was also reading the thread about the song on ac.net's forums and I was a bit surprised at the amount of people that said that it didn't fit FFVII:AC. I suppose they don't like it because it sounds too happy. But wouldn't that technically mean that they'd prefer a more depressing/sad song for the image song? I don't think AC is meant/going to be a sad movie, but I could see how people might get the impression that it's gonna be a sad one. Just look at the trailers! ;_;
IMO, I think it fits pretty nicely, even if I don't know the lyrics. It sounds like a song that you'd hear on the radio or something. (For some reason, I imagine the song playing while Cloud's traveling down some freeway-ish thing on Fenrir. lmao, as if Fenrir has a sound system on it xD) It'd make a good intro for the movie or maybe even the outro to start the credits.