Denver - International market isn’t that big - very long stage length, can only support 2 transatlantic flights as it is right now.
Chicago - Everyone says that this is their next market, but you already have Etihad to AUH and Air India trashing yields to India. It has made the market much less attractive. They’ll have to go here eventually though.
Miami - One of the shorter markets they could access, large catchment area - they’ll definitely go here eventually.
Honolulu - Insanely long stage length for a market that will produce lousy yields and has virtually no O&D demand from the middle east and can be reached more conveniently though Asia. Never going to happen.
DC - similar problems to Chicago (too much existing capacity to the middle east/India), but a smaller market, but also more prestigious. Will probably happen eventually, probably not soon though.
Atlanta - could happen in several years. DL has struggled on ATL-DXB and they have a ton of feed on the ATL end. ATL-Middle East and ATL-India is a growing market, but still comparatively small.
PHX - can only support one daily transatlantic flight as is. PHX-India and PHX-Middle East are tiny markets. Also very long stage length. Never going to happen.
PHL - Definite possibility due to shorter stage length and decent size local market with no existing nonstop access to the middle east (other than TLV) or India.