I've always wondered myself, ever since they released information on the Subspace Emissary. What was the adventure mode in Super Smash Bros Brawl going to be like? So many possibilities entered my mind, questions like "How will the story exactly end", "what will happen in the middle" All of that.

Well according to Kotaku.com, my question might finally be answered.

During the latest Iwata Asks, Sakurai began telling everyone about the games single player mode (AKA The Subspace Emissary). What came as a shock was finding out that the Subspace Emissary plot was designed by the legendary Kazushige Nojima, the man responsible for writing the scenarios for Final Fantasy VII, Kingdom Hearts and Final Fantasy X.

Of course, this is big news. Final Fantasy VII was one of the best games of all time, with the greatest story line I had ever seen back then. To have such a writer working on the Subspace Emissary mode means I have high hopes for this game, more than I had before. (Which was a lot).

You can view the rest of the interview here if you wish to know more.