The one thing I would want now with these lightgun games on the Wii is a proper lightgun. I own the perfect shot, the wii zapper, and several other shells, but none match the Guncon controllers, or even various third party ones for older systems.
I want one that is more than a mechanism hitting B. Some company should be able to figure out, and not be to cheap to, make a gun controller that plugs into the nunchuck slot and have the B (or A) button functions to a new actual trigger button. Also having the entire thing balanced would do wonders.
I don't even see why it would be so difficult considering the Guitar Hero controllers do the same thing.