I get the appeal of Atlanta, I really do. Huge metropolitan city, gets a chance to grow roots in a very urban market (They would kill to have another PK Subban right about now), creates natural rivalries with Carolina/Florida/Tampa...
...But at the same time, the fucking league's failed twice there. Southern markets, and markets in general that don't have real winters, are always going to have a hard time caring about hockey. Kansas City, Milwaukee, Portland, those cities may be significantly smaller, but I think they would trhive. Especially Kansas City. There's no show in Kansas City during the winter beyond the Chiefs, and MLB/MLS have the city locked up in summer. It's an excellent sports town.