Not much support or interest in club world cup in these parts. Frankly, I think its a flaky idea and not something I would bother watching unless the Crusaders were involved. In football, hardly any of the big clubs like ManU, Barcelona or AC Milan club sends a full strength team. Most NZ SR franchises might not want to overextend their top players with additional matches when they should be resting
What might be of interest once they get a global season sorted is a one-off match every year between the Super Rugby Winner and the Rugby Champions Cup winner.
ETA: The way to deal with one team being dominant is for the other teams to improve. NZ has done what it has done with very few financial resources, certainly much less than their immediate rivals, so they have had to be smart about the way they have used those resources. People who complain that we are lucky to have our huge pool of talented players underestimate how smart the NZRU have been in nurturing, developing and growing that talent pool. It started at the bottom with grass roots, and worked upwards, not the top down approach that some National Unions have taken, for example, the ARU.