Some markets will be profitable for XLRs, others will not. The biggest difference is cargo. AA Cargo is doing really well right now. Places like London Heathrow do not make money on aircraft from the US that do not have a ton of cargo. JetBlue is losing money on Heathrow flying as a result of no cargo.
The XLR's will have a lot of premium seats. If we can fill them with paying passengers, they will be a great addition for AA. Look for places that we currently do not serve. PHL/JFK to Shannon, Edinburgh, Cologne, etc... Also, some wide body flying doesnt make sense to do it all year on a 777/787, so seasonal routes will play a big part as well. A 787 out of PHL in the busy months, and a 321XLR in the slower months when that 787 is utilized elsewhere.