AA would love to operate the KORD service all year round, but the profits on a winter service would nowhere near match what they can get by utilising the a/c on a KORD to Caribbean service for the winter months, that's a far more lucrative market for them.
The KBOS service is still rumoured to be in negotiation with the BAA to start this year, although I would not expect anything now until next year.
The biggest problem we will have this year once again is space to park the aircraft, even when the Q stands open, it's going to be chaos as they are only for parking a/c, so there will be no boarrding or disembarking of pax, meaning a/c will need to be towed.
I reckon that come 6am during the summer period, the airport will be full with 2 maybe 3 a/c holding in the air and maybe another couple on the ground waiting for stands.