All we really can do is speculate over the meaning. Since they've given us absolutely no further information on what this actually means. It's going to be hard to believe any of the very easy to make assumptions. If they did 3 parts, I would figure they would do $20 each.

However, right now I'm going to sit in the camp that they are just going to be remaking the entire Compilation, which would actually be great news for people that never got to play Crisis Core or Before Crisis. If that's what they mean, then this would be awesome and everyone is freaking out over nothing. It's a long shot I think, but a realistic answer to the way they worded it.