Michael Boyd and his 'group' are famous for this: make a bold, overwhelming statement, and then back it off and 'tune' it with a series of disclaimers and backpedaling. For instance, if challenged on the issue, I'm sure he'd say:
"I didn't say THE dominant carrier, I said A dominant carrier"
"I didn't say American Airlines, I said AN american airline"
"Well, that depends on what the definition of 'is' is."
First of all, where precisely does Mr. Boyd suppose that the money for such an expansion by AA would come from? AA is literally on life support. They have a $5.5m/day cash burn rate. They posted the single highest yearly loss for an airline in history in 2002. They did raise $600m in financing in Q4, true, but analysts belive that American has no unencumbered assets left, or precious few. AMR management has stated that they do not believe a yearly profit or even cash-positive status is likely.
Secondly, AMR management has no bandwidth remaining to deal with a rapid expansion at SFO. They're still digesting TWA and trying to retool themselves to compete with LCCs. Even if they wanted to swoop into SFO, the LCCs would beat them to it. Don't fool yourselves: Alaska, Frontier, Southwest, and jetBlue all have contingency plans ready and waiting for action if UA exits SFO. My bet is that jetBlue's little hub in LGB would be moved overnight if necessary to have them set up shop at SFO, a page taken right out of Herb's book after Midway part 1 collapsed.
Finally, why would AA want SFO right now? They're in deep, deep doo. If UA, also deep in the pooper, couldn't justify their longtime presence there, what makes AA think they could? I think Carty & Co. are smarter than this.
Sounds to me like Boyd is doing planning for one of those virtual airlines with 8 hubs in each time zone and hourly service to London and Tokyo. I shudder to think what his hourly rate is to his clients. Every industry has its quacks, and Mr. Boyd loves to flap his bill.