The "good news" was specifically about Christ's imminent kingship/rulership in heaven, to be followed by his rulership over the earth. (Matthew 6:10)
Basileia (kingdom) - royal power, kingship, dominion, rule: not to be confused with an actual kingdom but rather rulership, the right or authority to rule over a kingdom, of the royal power of Jesus as the triumphant Messiah." (https://www.blueletterbible.org/lexicon/g932/kjv/tr/0-1/)
(Mark 1:1) "The beginning of the good news about Jesus Christ, the Son of God:"
(Acts 5:42) "And every day in the temple and from house to house they continued without letup teaching and declaring the good news about the Christ, Jesus."
(Acts 8:35) "Philip began to speak, and starting with this scripture, he declared to him the good news about Jesus."
(Acts 10:36) "He sent out the word to the sons of Israel to declare to them the good news of peace through Jesus Christ—this one is Lord of all."
(Acts 11:20) "However, some of the men among them from Cyprus and Cyrene came to Antioch and began talking to the Greek-speaking people, declaring the good news of the Lord Jesus."
(Acts 17:18) "This was because he was declaring the good news of Jesus and the resurrection."
(Romans 1:9) "For God, to whom I render sacred service with my spirit in connection with the good news about his Son..."
(Romans 1:16) "For I am not ashamed of the good news; (about Christ) it is, in fact, God’s power for salvation to everyone having faith, . . ."
(Romans 15:19) "I have thoroughly preached the good news about the Christ."
(1 Corinthians 9:12) "...but we are enduring all things so that we might not in any way hinder the good news about the Christ.
(2 Corinthians 2:12) "Now when I arrived in Troas to declare the good news about the Christ..."
(2 Corinthians 4:4) "....the god of this system of things has blinded the minds of the unbelievers, so that the illumination of the glorious good news about the Christ,"
(2 Corinthians 9:13) "....they glorify God because you are submissive to the good news about the Christ, . . (2 Corinthians 10:14) ....for we were the first to reach as far as you with the good news about the Christ.
(Galatians 1:7) "Not that there is another good news; but there are certain ones who are causing you trouble and wanting to distort the good news about the Christ."
(Ephesians 3:8) "....so that I should declare to the nations the good news about the unfathomable riches of the Christ."
(Philippians 1:27) "Only behave in a manner worthy of the good news about the Christ,..."
(1 Thessalonians 3:2) "...and we sent Timothy, our brother and God’s minister in the good news about the Christ,..."
(2 Thessalonians 1:8) "....as he brings vengeance on those who do not know God and those who do not obey the good news about our Lord Jesus."
(Romans 10:17) "So faith follows the thing heard. In turn, what is heard is through the word about Christ. (not Jehovah?????)
(Romans 15:20, 21) "In this way, indeed, I made it my aim not to declare the good news where the name of Christ had already been made known, (not the name of Jehovah?????) so as not to build on another man’s foundation; but just as it is written: “Those who received no report about him (Jesus Christ or Jehovah?) will see, and those who have not heard will understand.”