UPDATE: So much for informed speculation, as I waxed eloquent yesterday about American's plan to ramp up more service at New York area airports. Here's the basic story. The airline said it would serve seven new destinations from the New York area; PHL is not one of them., Based on AA saying this announcement would be of "interest" to PHL fliers, I guessed one of the seven would be PHL to Kennedy airport to feed international flights. I will strive to be better informed from now on.
Any increase in service that enhances international connections at JFK, of course, is of interest to US Airways and customers who use its overseas flights from PHL. The recession has prompted US to trim some of its Europe flights from PHL, and AA may be moving to take advantage of what could be a perceived weakening of US's competitiveness through the PHL hub.