The term "New" covenant directs you back to the "old", law, mosaic covenant for contrast and understanding. (rejecting the idea of types and antitypes notwithstanding).
Was not the majority of the worshipping nation in the Law covenant? all of them bound by it? why should it be different today?
relevant text in today's wt study: par 11, -- Jesus in Mark 3:35 : "Whoever does the will of God, this one is my brother sister mother" not in the future, since it was spoken. wt quoting bible, but not listening. obfuscation.