I am pretty sure that AA's equipment allocation has not been done yet for the NS15 season starting on 29MAR15.

Before panicking you may want to should wait a few more weeks, and take action only then.

There's a rumor over the AA board that in the Joint Business Agreement AA has committed to 100% lie flat seats in J over the transatlantic by NS15, which is why it is -- at the last minute -- upgrading J on some of its 763s and 777s (which will gain the 772 designator after conversion). If that's the case, you will most likely see a lie flat seat when equipment is allocated, probably a 772.

[Edited to add: the currently scheduled 772 (flat J) are on the schedule only until 28MAR15, none appearing after that, a clear sign that the equipment allocation has indeed not been done. The US/AA integration is most likely the reason why they're so behind with it]