CX Airline Planning rotate half the worlds airports across their desks every year. If you get a chance to buy one of them lunch you'll find they are an interesting group of people. The trouble with nearly all the routes that they study is that they bleed red ink on the bottom line.
Honolulu is a case in point. It's dusted off every year, run through the simulations and put on the back burner again. At present there is no way CX with its fleet mix, configurations and onward freedom rights can make it pay. Pity for all of us, as apart from the overnight(s) you can imagine that the guys in airports, the engineers and marketing are killing each other to be posted there...
Munich predicts black ink for most of the year, and it does not canibalise FRA as much as you'd think. As stated above, LH run BJS-MUC and it does very well. And its easier to get a sensible new slot time out of MUC than FRA.
Trans-atlantic has been looked at for a few years now. It’s a beast to make a buck on, but there are marketing possibilities for a premium product there, as most of the established operators have gone down market for their revenues. (Hence the new all business class airlines). Its also a dream of London, so they try hard to make the models work. It may even happen in the next few years.
Zurich was killed by the Airbus product (sorry Airbus guys but that is what the Swiss end said...) as the Swiss did not like the 340 on the long haul . Since then Swissair has gone belly up, so there is a good market left, and a 747-400 daily would work most of the year. ZRH always has the back end problem, in that it is very difficult to sell Y class on that route - hence the attempts at linking it with MAN originally.
Christchurch is, I understand, a developing market, and you know how CX don't like to develop a route - they let someone else bleed for the first couple of years then go in halfway up the curve. But it makes more sense than Auckland for the "fresh air and excercise" vacation market, which is strengthening from both HKG and Southern China. And we love your seafood.
I don't know much about the American side, but those noted seem sensible. CX don't mind being mildly on conflict with AA as on those routes their products are different. I do know that the front end is very strong across the Pacific, so we could perhaps tolerate deep discounts in Y, which would just about pay the rent.
Others that are looked at on a frequent basis are Buenos Aires and Santiago (either through JNB, HNL or AKL); Madrid, Manchester nonstop, Cairo, and Istanbul, (again), and Vladivostok.
When they get a combination of black ink on the route simulations, enough aircraft and crews, and someone else to test the market first, I think they'll give them all a go, but it will take a few years.