It's sorta amazing just how badly DL has always struggled in the HKG market.
But then again, one thing that contrasts them to their extant peers, is that they've never served HKG from more than one stateside (Lower48) destination at a time. So when it was LAX, then DTW, then SEA, it's always been sort of a geographic limitation for a significant part of their customer base.
By contrast, UA and AA/CX have all parts of the country covered with a 1stop or less; and can start focusing on things like LatAm to HKG and beyond.
Anyhow, let's see what those crazy people at DL come up with next for HK!
So now that DL will have an airplane that might swing the economics of DTW-HKG back into DL's favor, being able to offer two nonstops and nearly all points of the country 1stop; maybe that'll improve their stateside offering.
Probably won't do much for their HK-side P.O.S. though, as I doubt many people in HKG have any clue who they are. Last two times I was in the city, I scoured the place looking for the slightest hint of DL advertising-- only to find none.
I really wish I could know why they haven't been tripping over themselves to partner with HX, who has intercon codeshare relationships. Or heck, even UO, despite U-FLY.
It could raise awareness of their service in the market significantly, and also provide some southern Chinese feed that CZ can't really help them with, seeing as they don't fly to CAN. But I guess they don't see it that way... yet?
I myself, suspect a more prosaic motive... ~Thranduil