Not sure of the process involved vis a vis a code share agreement being signed off by labor groups. Eagle is already doing a lot of routes that were previously S80 and 737 routes. ORD-HOU ORD-ELP ORD-SAT LGA-ATL, etc with CRJ700's. More and more Eagle traffic is not actually feeding Amrican, rather point to point pax travel. American is retiring its S-80 fleet as they take on new 737's (800's I think). I would think it will be a somewhat gradual transition. Terminate some fee for departure contracts and replace with code share that just happens to run the same "feed" but under a different scheme.