But hasn't Munich been tried and failed? HLX ran it off and on for a couple of years and the figures weren't great.
Unless it was operated by Lufthansa then connections are not easy and NCL will not even be on their radar given the other priority destinations for business use.
Frankfurt is the holy grail as its Lufthansa's main hub but as I said there is a scarcity of slots and same applies, can NCL justify it over other destinations?