You are correct..the eventual plan is a 737/757/767/777 fleet.
Now, as we covered this at least a dozen times already, the A-300-600's are in the fleet plan until thru most of this decade (2008-9). The cycles are not bad as most are used in longer stage length flights to the caribbean or trans Atlantic. They are like a cash machine for AA..great lease rates, etc.
As to the Fokkers..assuming the US/UA/AA/DC Air deal goes thru, AA gets 40 more of this type. One would have to honestly assume that since the acquisition costs of the 40 units will be quite low, and the original 75 are paid for, that gives AA some low cost lift on 115 aircraft. So, why spend money, right now, on any B-717's, 736's, or anything else. They will most likely be around for another 7-10 yrs.They will be spending lots of money on intregating the US assets as well as TWA (assumption).
My best educated guess is that after the dust settles, AA will look to finalize the long range plan (10-12 yrs?) to replace most of the huge MD-80 fleet(excepting the newest 24 ex TW md-80s), they will continue the phase out of the 727's , and look at what is the best replacement for the 762's..either more 763's or new 764's. Probably more 752's or some 753's in the future also.
I also would not be surprised to see more options exercised on 777's, perhaps as many as 15-20 more. Actually, I think that some years down the road we will see a fleet of almost 100 AA 777's.