This impacts the Big Sky because there has been talk that Idaho could potentially join the Big Sky conference in all sports except football. However, with the WAC adding teams, the likelihood that they would just remain in the WAC is stronger.
This is according to Vandals Nation:
Despite conversations with the Big Sky, the University of Idaho will still most likely be one of those schools playing WAC olympic sports for the 2013-14 calendar. As of today Idaho has not withdrawn from the WAC, nor has the school stated intentions to withdraw from the WAC.Adding Idaho would make the Big Sky stronger, but there is a chance the conference will be stuck at 11 teams for the forseeable future.
Follow me on Twitter @bigskybball