If any NY service is announced it would only by the LS annual shopping trips but based on previous years normally not released this early.
If and its a big if a NCL - NY route is announced I would imagine this would be for a Summer start and aren't we a bit late for this, bearing in mind its already nearly March. Sales should be up and running now. No airline is going to start a regular scheduled service to NY with a Winter start up date.
However I know that CO have been monitoring EK performances and yields from NCL for a while now.
If this had been two weeks ago then this rumour may have had some credibility as for one day on the CO route map NCL kept appearing and then disapearing as a direct route from Newark. However when a manager at the airport was asked this was dismissed out of hand.
I think its safe to say no such announcement on Monday though.