I think that this series is already postponed. The Irish board issued a statement last month. And it needs to be seen whether they will re-schedule these matches to a latter date. The international calendar is very crowded and it will be difficult to find enough time window for bilateral series such as this one. And NZC is not going to bother much, taking in to account the limited revenue potential from this tour.
PS: I have very little information about cricket world from last few months. It is a good thing that you guys are still keeping this section active and the discussions are going on.
I wouldn't blame them. First of all, the cricket boards are not clear with the schedules. They are trying hard to move ahead with the tours till the last minute, and the cancellation is being done only a few weeks before the matches are about to start. And another thing is that Espn Cricinfo isn't updating the schedules for some time. They have updated the dates for England vs West Indies series, but they haven't done that for the other series.