Okay to start off what I hope will be a half successfull thread, I do have an idea or two, and I'll add more as they come.
The first idea I have is for a true boxing game on the Wii (I know wiisports has one but I don't know the mechanics so stay with me). The Wiimote and nunchuck would both be used, one representing each hand of the boxer. The game mechanics could be simple, move both down to duck, right or left to move right or left. To punch you simply have well...punch. Also each hand could have a 'super punch' ala super punch out where if you hold down the a or z button respectively you can use the super. This punch would have to move a little slower on screen as you are putting more power into it. I personally would love to play a game that got me into the action of boxing without having to take the pain.