oops - you forgot to include NCL's most recent announcement in regards to their expansion plans [sic] for NCL America:
Dated September 7th, 2006
NCL’s President and CEO, Colin Veitch, said: "[...] Our U.S. flag start-up costs have obscured, for the past two years, the attractive financial returns on the international fleet of ships that we have built since Star Cruises bought NCL. All our growth from now on will be in this strongly profitable sector of our fleet
Hmm - so no further growth for NCL America, I guess. No further NCL America growth = no addition of the "United States" to the NCL America fleet = no reconstruction of the "United States".