Right now, the fulfillment of the New Testament is upon us because we are the focus of His salvation. If we are all righteous, why do we need to be saved? So salvation has to come.
The Bible says that when the Spirit of truth has come, He will guide us into all truth and He will show you things to come.
13 Howbeit when he, the Spirit of truth, is come, he will guide you into all truth: for he shall not speak of himself; but whatsoever he shall hear, that shall he speak: and he will shew you things to come.
Those things to come are not yet written but they will be revealed through the Voice of the Appointed Son whom the Father has chosen in the last days because He will speak through the Son.
1 God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,
2 Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;
Many people would say that this verse refers to Jesus Christ in the Jewish Setting as the Son of God. That was true when He was in the position of the Son.
But now in the Gentile Setting, He is in the position of the Father. So this now refers to the Son of God in the Gentile Setting because as I said, I have inherited the Sonship, including everything that is due to the Son.
1 Corinthians 2:9
9 But as it is written, Eye hath not seen, nor ear heard, neither have entered into the heart of man, the things which God hath prepared for them that love him.
7 He that overcometh shall inherit all things; and I will be his God, and he shall be my son.
The “HE” is a qualifying pronoun