There already *is* a China ABD, and it's a fantastic itinerary! Although it does not include Hong Kong
Disneyland. It does, however, end in Hong Kong, so adding a day or two in HKDL wouldn't be that hard.
I know several people who were hoping they'd do an ABD add-on to the Baltic cruise!
ABD offered a NYC/Boston trip. It was dropped before any of the trips actually occurred. I don't know if it was a logistical issue, or it just never sold. I don't know about Boston, but I'd love to do NYC with ABD and not have to worry about getting around, etc. New York can be no fun to navigate, especially with luggage!
Sayhello