Theatrhythm box reveals paid DLC, 'Nintendo Network' logo
The Japanese box art for Theatrhythm: Final Fantasy, spotted in the wild by Twitter user joshua_x_ (probably on a retail poster) notes that the game features downloadable content, and, in fine print, that this downloadable content is paid. If you were wondering which game would be the first to support the 3DS's new DLC infrastructure, there you go.
The front of the box also features a "Nintendo Network" logo, which hasn't been used elsewhere before. This is likely some kind of rebranding for the Nintendo Wi-Fi Connection, rather than a completely new service, but we'll certainly find out before the game's mid-February release.
Finally, the box identifies the genre as "Theatrhythm Action." That's just a bit on the nose.