Mario vs. Donkey Kong is a prototype tech demo made specifically for showcase at GDC, so chances are this is not a game that we'll see in the future.
However, there's been no confirmation that it's NOT in the works as a full title. Check out the video below to see the very cool demo.
3 news items
Nintendo has detailed the return of its World Championship
Do you have what it takes?
Disney Infinity 3.0 Edition Officially Revealed
The Force is strong with this one...
Rumor: Disney Infinity 3.0 Leaked Early
Straight from a Galaxy Far, Far Away...
Mario Kart 8 DLC Pack 2...OH YEAAAAH!
Nintendo should do this more.
The Nintendo GameCube: An Interesting Legacy
Will The Wii U Have a Similar Fate?
Project Ukulele - Possible Hint at Characters
Could it be?
Free to Play Pokemon Shuffle now available on 3DS eShop
Nintendo offers another micro-transaction based title
Gold Mario Amiibo is a Wal-Mart Exclusive
Get ready to shell out your coins
Area Effect Announces Izle for Wii U
Part action, part adventure, all cel-shaded
Nintendo Confirmed As Sponsor For APEX 2015
Another positive step for the Smash competitive scene
Wii's World is not officially affiliated with Nintendo! (but they wish we were).