That list is very helpful. Have to imagine it is either Florida or Midwest at this point, but as others have mentioned TPA and MCO have LGW service.

In the Midwest:

IND has certainly been making a LOT of noise about trying to attract TATL service, with London repeatedly mentioned as top destination. I would be very surprised though given the proximity to ORD (I know people south of IND who regularly drive to ORD for TATL/TPAC), although perhaps they see opportunity to get in as the only TATL carrier (no WW/FI) and poach demand that would be going to other carriers at ORD.

On the other hand, CVG or CLE would be really interesting as DL/UA have drawn down those hubs so much... could be enough to lure major corporate contracts?

CMH seems the wild card to me.