The WiiZapper hasn’t really been promoted at all since Link’s Crossbow Training. Most on rail shooters use it, but the only way you can tell is by a small icon on the boxes. It looks like Nintendo may be planning on trying to push the shell again though. In Europe and Australia Resident Evil: The Darkside Chronicles will be bundled with the WiiZapper and in Japan House of the Dead Overkill will be bundled with it as well.
As of right now North America doesn’t have any announced bundles, but considering the WiiZapper wasn’t received well, most people probably won’t miss the bundles minus the awesome looking boxes. Resident Evil: The Darkside Chronicles bundle will be released in Europe November 27th and the House of the Dead Overkill bundle will be out in Japan September 17th.