The wii could use more point-and-click adventure games. There's one out, and one rumored to be comingout.
The wii could also use more -true- 2d (maybe 3d) sidescrolling games.
The wii could use more racing games.
But it all depends on the sales of Medal of Honor: Heroes 2 concerning your FPS.
If sales aren't great with it, while FPS's are selling very well as compared to them on the PS3 and 360, then why, from a game making companie's point of view, should they try also?
They could just as easily make a cash-in mini-game collection.
Or better yet, they could make a -good- mini-game collection.