I have no info one way of another, but I'm cautiously optimistic based on the combined market share of AA and US.

The 2011 numbers were JB with 26.8% of passengers and US/AA combined with 25.5%. DL was around 11%.

Who knows what Parker will do. Hard to believe he would trash that much of a market share. BOS isn't PIT or LAS with other connecting hubs nearby. Plenty of originating traffic with plenty of FF miles in their accounts.