http://www.ign.com/articles/2014/06/10/e3-2014-mario-party-10-coming-to-wii-u

Nintendo revealed Mario Party 10 as a Wii U game in 2015.

Alongside classic Mario Party play, this tenth installment introduces "Bowser Party," a new mode that transforms the person playing with the GamePad into Mario's longtime nemesis. The fire-breathing enemy can then proceed to wreck havoc while the other players try to avoid his attacks.

Mario Party 10 will also be compatible with amiibo, the figurine line which Nintendo announced during today's E3 Digital Event.