I think the estimation was: flying could bridge to DFW (LAX-AUS/SAT/COS-DFW etc.)
Currently 100% of the AA flying is LAX out-and-backs. I've heard that the Mesa and SkyWest AA domiciles are closing and we will be the only AE operator based in LAX. That doesnt preclude another carrier from operating in LAX for AA, just means it wont be on a large scale. That said, does AA want 100 flights In/Out of LAX every day on the E-175? I dont really think so. I find it more likely that they start moving us through PHX or DFW as the schedule progresses.
Does this mean there will be another base? That'll be interesting to see how it goes. Obviously DFW would be an easier choice because the DL operation supports 5-10 departures a day.
Also, its yet to be seen how the new AA deals with its newly expanded amount of regional flying and carriers. So far, it seems like they are keeping everybody to their own bases - which is opposite from DL who likes to have multiple carriers in each base.
My magic 8 ball says: Check back later...