Don,
Thx. I do believe CX could fill the A380 at least once per day to LHR, LAX, and JFK (maybe SFO as well). Of course, any airline can fill anything if willing to collapse yields. I think the question for CX is return on investment. I believe CX sees a higher ROI from another A350 or 777 than it does from an A380. Keep in mind that the real price of those two twins is around $150M and the A380 is about $190M. I'm sure CX could get the -8I über cheap since very few carriers seem to want them. So maybe those numbers start to look extremely attractive.
I agree with Busy B that CX needs something bigger, even if only in small numbers (10-12). The -8 makes more sense from a cargo volume perspective and because there would be essentially no training costs for crews and maintenance on the Intercontinental. However, maybe Doric offers CX attractive lease terms such that the A380 makes sense.