I don't think this is likely, but given
DCL's "classic ocean liner" aesthetic, it would be interesting to see if they'd ever have a ship that makes transatlantic sailings on a regular basis, a la Cunard's Queen Mary II. They could even do it as a triangle, where the first cruise goes NYC to Southampton, then the ship goes from Southampton to Florida (Port Canaveral or Miami), then the ship goes from Florida to NYC (via Bermuda--although would that qualify as a "distant port"?) and then from NYC either back to Southampton OR back to Florida (again, via Bermuda, if that's legal) and then from Florida to Southampton. If Bermuda doesn't count as a distant port, then they could just go NYC--Southampton, Southampton--Florida, Florida--Southampton, Southampton--NYC.
Basically, my thinking with that is that while they may not be able to fill the ship to go transatlantic between the same ports every week, if they alternated ports it might fill the rooms. There are a lot of people, particularly older people, who enjoy the transatlantic cruises and if they were an actual itinerary (rather than just repositioning cruises) they might do well. But there's also a reason I'm not in the travel planning business so I'm more likely to be wrong than I am to be right. I'd love to do one during the summer with our family.