NH is already on it though with UA - both into HND not NRT.

I don't think IAD is high on the list for the next few years particularly given the aircraft shortage and I think they will want to increase frequencies to existing ports but I do think CX will go back eventually. Its a top 10 US metro and the only other ones I could see getting service ahead of it are MIA and maybe PHX. PHL and CLT don't really do much that DFW can't and I don't see them going into the likes of IAH or ATL.