There is no need to look beyond the Scriptures to know that the word "new" is not written in Daniel 9: v.27.
There is no expression "new" in Daniel 9: v.27, it is incomprehensible the intention to add the expression "new" to this specific Covenant, worse, adding "new" to the Scripture, as whether was a "new" covenant in Daniel 9: v.27. Wrong. Completely wrong.
Be sure that the covenant for one week broked in two halfs expressed in Daniel 9:v.27 has nothing to do with either New or Old Covenant established by GOD. In fact, the devilish and satanic covenant for one week, BROKEN IN TWO HALF, according Daniel 9:v.27, it is between two powerful Man Beasts, i.e. between the Man Beast of sea-Revelation 13:v.1-10, and the ruthless Man Beast of the earth like a lamb with two horns, and speaks as Dragon- Revelation 13:v.11 to 18, the 666, combined with Revelation 11:v.2 : - the COURT which is without the temple leave out, and measure it not; for it is given unto the GENTILES : and the holy city shall they tread under foot forty and two months.
That said, it is clear that the SATANIC covenant mentioned in Daniel 9:v. 27 has nothing do with Covenants established by GOD with His people, but with a demoniacal, satanic, covenant between two satanic Beasts which JESUS revealed through the Book of Revelation chapters 13 and 17, and others.
The law and the prophets prophesied until the time of Elias which came around two thousand years ago, manifested as by John the Baptist whose name also came from heaven. And from the days of John the Baptist until now the kingdom of heaven suffers violence, and the fearless and courageous man takes it by force. But the fearful, or coward, will not enter in the Kingdom of GOD which He will establish in this current millennium, the seventh and last millennium or seventh and last Day, the Lord's Day.