Though we don't know where it's going. UPDATED: More details
http://www.nintendoworldreport.com/news/41026/vs-excitebike-releasing-this-week-in-north-america
UPDATE: Nintendo has confirmed to us that the game is the Famicom Disc System version, including the track editor, additional tracks/music and 2 player multiplayer. The release will happen once the challenges in "Builders Week" are completed, the first of which is to tip in Maro vs Donkey Kong: Tipping Stars. Original story follows.
Nintendo appears to be releasing an old Famicom Disk System title this week, but have not indicated which platform will get it.
A tweet promoting "Builders Week" on the Nintendo of America Twitter announced the release this week:
Vs Excitebike released on the Famicom Disk System in Japan in 1988 and features new music, saving of custom tracks and a 2 player mode with adjustable lap options.