First I will say that I don't like this thread. Why would you want a genre to die?
Second, how in the world can you say that there are too many platformers? If this was 1990, then you might have a point, but last gen platformers were almost dead, on life support. This gen there are a few more, but still not as many as in the past. We actually need more. For some reason I just think you are angry about NSMBWii success.
I don't want any genre to die, but there are a couple that I would like to calm down. I agree with the party/mini games. There are too many now. I would also like to see less FPSs. I like to play them once in a while, but there are just too many, and they are becoming repetitive.
We need more adventure, action/adventure games like Uncharted.