I just had a great thought, and a superb game idea.
It'll either be awesome-or I'll get killed by insane fans. Your mileage may vary.
The idea-remember Bushido Blade? (If you haven't, you missed a great game that every fighting gamer player should have owned.) Solo player game where there was no health bar, no "blow up the scenery" super moves-just guys (and gals) with swords and making the most of a massive dojo area to fight in.
The concept-Bushido Blade Wii. (Wait for it...)
Single player game, with the Wii Motion Plus to control the sword, and the Wii Balance Board to control the player (move the player's balance to move where the player goes, to dodge, etc, etc...). The game is played either from first-person or third person (with a "ghost" player), with multiplayer being done by the WiiConnect.
All sorts of gameplay options, including a "Highlander" option (fight your way to beat the enemy, then take their head), 10,000 Ninjas (survive waves of ninja attackers), and with the amount of accuracy that the Wii Motion Plus offers...you'll be seeing a lot of geeks that can suddenly go pretty good with a sword (I'd find that awesomely cool, as well).
Somebody's going to have to say "it's a great idea" or "it sucks"-and if you think it's great...how does one get a Wii Dev kit?