Nintendo announced a brand new entry in the Mario Party series today for the Nintendo 3DS. New power-ups, and seven "all new boards" that feature their own mechanics are in the works for this new entry.
One board showed a risk-reward feature, with the ability to hide from a bullet bill that could attack at any time. Not much else was shown other than a few new minigames and boards, but we'll provide more info as it comes.
It's coming this Winter!