Combined they have roughly 600 airplanes on order.
American Airlines
Lots of overlap too.
319, 320neo, 321, 738, 737MAX
332, 358, 359, 773, 788, 789
Looking at their current fleet, I just don't really see 600 airplanes that need to be parked. Even if you parked the 734, 320, 752, 762, 763, and M80 fleets, thats only 500 airplanes.
That leaves a net gain of 100 airplanes with a total mainline fleet count of 1052 airplanes (!!!!). Obviously that isn't going to happen. So something is going to have to give in the orders department. Any guesses?