How strong would a AA and SWA merger be. After AA comes out BK, there will no longer be legacy airlines, just a lot of low cost airlines. I know SWA have a different route structure system then AA, but I'm sure the schedules could be tweaked to make it work. The one thing that might be hard to understand at first will be for the corporate culture, AA likes to piss off the employees by delaying contracts for years while SWA likes to make their employees the highest paid.
After all we still have f/as who will tell you, "We used to have people that cleaned the galleys and the cabin. We NEVER had to clean either." (My response: Yeah, honey. And, they used to run this route with a wagon train, but you know, times change.)