Having played the Wii SPorts game, I think it would be great to do a PGA title for the Wii. As this console is designed to get the whole family involved and bridge the generation gap, a PGA game would be great.
I used to play PGA on my Megadrive with my Father years ago. You could use the Wii-mote on the PGA game the same as you do on the Sports game. If you swing to the left or right as you take the shot you would hook/slice the ball.
Also as a money spinner for Nintendo you could be given the opportunity to download additional golf courses for a small fee from the internet.