I think Battle.net can coexist with LAN, we as a normal player go for BattleNet while Blizzard can sold a 8 player LAN package (specific IP) to a CC with BattleNet connection too. I miss those day that I can go to cc with my fren to play SC BW.

But I'm sure those hacker will make use of this lope hole to create a private sc2 empire.