I've been through a few mergers in my career as well. Given the current environment with the drastic drop in passenger traffic, I don't think that the government would frown upon anything that would help the airlines get back on track. My thoughts are an eventual combination of AA & B6, and possibly even AS put into the mix at some point. They all got together for a good reason, to generate more connecting traffic and revenue. The next step to profitability is cutting costs by consolidating anything that they can. The fleets are already on par with each other with AA having a large fleet of Airbus and 737s. Only time will tell, but I wouldn't rule out anything at this point. Years ago, I wouldn't have thought that there would only be 4 major airlines around someday.