This whole article is pure speculation and nothing more, completely ignoring things like Nintendo just last month again confirmed March like release date (why they would constantly conforming March like release date if they are going to delayed it) and fact that Nintendo several times said they dont want to unveil NX too soon because they think competition could stole their idea.
There is no reason to doubt about March like release date for NX, unveil will be most likely be end of September or early October.












