He also gave us a look at the new amiibo party mode, which will require amiibo in order to function. (nintendotoday.com)
You don't need to buy all of the toys to play amiibo party, just (at least) one, which a majority of fans have probably already bought. (mariopartylegacy.com)
For those who enjoy the car version can play the regular mode, and amiibo party gives you the long awaited single player mode. (mariopartylegacy.com)