IMHO,
AA doesn't need the domestic feed, they are patiently waiting for the opportunity to go after the old BA deal.
Domestic Route Structures:
It is strongly rumored that ALPA and APA have put ink to something important regarding AA/AE integration. Real time interoperability, control and the reduction in duplication of operational structures will reduce costs while improving efficiency. For M&E, the Ramp and Dispatch; the TWU already represents those groups with integration resolution already covered in the respective CBAs. That leaves the Flight Attendants to resolve integration, everyone else will be done.
International Route Structures:
DAL, CO, NWA and their linkages with foreign carriers; the U/UAL/Star allinace plus the anti-trust immunities both bring to the table will make turning down a "tweaked" AA/BA deal problematic.
Add to that statements by Carty, echoed by members of the Bush Administration, to the effect that the Chicago Treaty, Bermuda II, Fifth Freeedom rights and Cabotage limitations are products of a world that no longer exists and that artificial barriers to investment and ownership weaken the industry potentially requiring Government intervention(tax dollars) to continually prop up a regulatory scheme that is obsolete.
You have the ingredients for a transportation system that utilizes AA/AE domestically with an integrated system of AA/BA, and potentially others, internationally.
Who will AA dance with? I think she'll find a partner from "out-of-town."