I'm hopefully getting a Wii soon, but one game I'd love too see made in the future is Super International Cricket. The SNES version was a lot of fun, and there hasn't been a truly great cricket game for years. Batting and Bowling could be so much fun.
A lot of people from overseas probably couldn't care less, but I know a lot of Aussie's that would love to get their hands on a Wii cricket game.