Think B6.
Given the baggage LCC would bring, and its -profitable only at bottom of the industry compensation packages network- there's no way AA would be interested. If they were, it would have been done a long time ago. If the markets were so prime, WN would be in them, and others launching new service.
Fact checks: AA's proposal to APA was looking for domestic code share with LCC on the shuttle only. (NYC business travelers)
Of the three Global alliances, AA NEEDS to be bigger in NYC to be competitive with STAR and SkyTeam. LCC just bailed from NY LGA. B6 has a strong position in NYC and owns slots AA needs to grow. So if AA NEEDS anyone, B6 fits the bill more so than LCC.
A couple of weeks ago, I came across some charts that showed a daily cash burn to zero, no income value for the US carriers. It was dated September 2011 if I recall. AA had 74 days of available cash, and LCC had just 42 days. I'll see if I can dig it up.
Have a look at this while you're at it.
http://www.fool.com/investing/general/2011/11/30/will-us-airways-hit-an-air-pocket.aspx
Better yet, lets do a deal today so we can get the judge to park you tomorrow!