Originally Posted by JimInOhio

It's certainly doable with a new Concourse C as the INTL arrival gates for UA can be clustered near the existing/remote AeroTrain station. It would be little different than the current C with the walkway to the CBP moonbuggy station. It's entirely different for Concourse A/B. There, you have all of A and at least half of B that will need a sealed walkway to a dedicated AeroTrain platform. That's probably three to four times as extensive as what's in place for the current C INTL arrivals to the point that it might just be too far for passengers to walk just to get to a train station. In fact, some will be walking much further than those going to the existing remote C station.