After Nintendo makes Wii music they need to make Wii Cards. They can sucker in even more of the casuals, and if they give it a good online multiplayer they could probably get a decent amount of core gamers to buy it too. If they made a good texas holdem online then they could attract more of the college age males to buy a wii, who would probably go on to buy a bunch of other games too.

It would be a good source of revenue since the type of people who bought a Wii just for Wii Fit would probably buy this game as well since they already know the card games themselves.

After they finish with Wii Cards they can make Wii Boardgames. Which would probably be even more popular. They could include Chess Backamon, Monopoly, Yatzee, Risk, Checkers and Scrable. Online multiplayer is a must for this one too. 

They already have Wii Chess thats online.....give it time.

They need an all in one type of game, no one would pay $40-50 for chess alone, so I assume it is wii ware. It won't do well since casuals probably don't even know about wii ware let alone know how it works.

I don't like card games that much, but who knows, that could be very succesfull.

Wii Chess is a disk based budget game, it came out some time ago. I agree a all-in-one package would be good for casual gamers.
If it was done well enough anyone would play it.

http://vgchartz.com/games/game.php?id=7655

Wii Texas Hold'em online with Mii's would be EPIC!!! If you could play with Wii Points or Money then i would s*** myself!

boggle would be good fun as well.

Heck, lets get a few people together and make a Wii Ware game compilation with our own ripped off versions of classics (to advoid fees)

Title :
VGChartz' Modern Classic Board Games For The Casual Gamer
or
VcMCBGftCG for Short.

You are basically saying they should remake the DS game "Clubhouse Games" for the Wii.

And Monopoly, Yatzee, Risk, and Scrabble are copywritten properties. You could include Chess, Checkers, Chinese Checkers, basicaly all of the stuff on Clubhouse Games.

I think might be a while before Nintendo releases this for Wii.....