Rygar - 100k max. Few even heard of the original, which was good but not great even when it released.
Tenchu 4 - Well, this one depends on the quality of the game. The original Tenchu games sold well, and were fun. Not so much with the recent entries.
Dead Rising: Chop 'til You Drop - 600k. People who don't have a 360 will still enjoy the game. Also, it'll get a few from those who already bought it on 360, as it does have some new features (like new enemies) and motion controls.
House of the Dead: Overkill - 1.1 million. What can I say? Wii sells light-gun games well. It's also a new entry in a fairly popular series.
MadWorld - 1 million. Besides the hype it's been getting, I actually think the negative press it'll receive will help it, just like it does with the GTA games.
Deadly Creatures - At present, I'd say 300k lifetime, assuming little advertising, 1.5 million with advertising. I have an interview coming up with Rainbow Studios (the THQ team making the game) and their advertising plans are going to be one of the topics.
The Conduit - 2.2 million minimum. SEGA has said several times that they're planning a fairly sizable campaign for the game, and the Wii is sorely lacking in quality titles in this genre.
Sin & Punishment 2 - decent hit, at 500k. I also think that almost everyone who bought it on the VC will buy this one.
Little King Story - 150k--just the name alone is going to be enough to detract a lot of potential buyers.