From an interview at GamePro, Nintendo Senior Vice President George Harrison regarding Twilight Princess:
GamePro: What sorts of online features are you looking forward to in the future?
Harrison: Downloadable content, such as additional levels.
That’s a pretty incredible statement and one that I tend to doubt. (It wouldn’t be the first time a Nintendo rep made an inaccurate statement and later admitted it was a mistake.) But if it is true, what sort of content would you like to download for Twilight Princess and how would it figure into the story?