No, the plan was not scrapped, just misunderstood.
Many of the Jews assumed that the "everlasting kingdom" of Psa. 145:13, Dan. 4:3, 34; 7:14, 27; 2 Pet. 1:11 was supposed to be a physical, fleshly kingdom here in this earth realm.
Just as the Israelite had refused God as their king (1 Sam. 8:7) to be like the nations around them, they again rejected God's plan by crucifying His Son because they still wanted to be like the nations around them. They wanted to have an earthly king who would reign in Jerusalem and free them from the Roman occupation under the Caesars.
The Pharisees asked Christ when the reign of God would come (Luke 17:20). They were expecting to be told of an earthly reign.
His disciples didn't understand either as they asked Him before His ascension...
"...Lord, wilt thou at this time restore again the kingdom to Israel?" (Acts 1:6, KJV)
They wanted an earthly kingdom with the power and wealth that their fathers had enjoyed under David and Solomon in the beginning of the kings of Israel.
But, Christ told them that His kingdom was not of this world (John 18:36), meaning that the origin was from heaven above; that the kingdom did not come with observation (Luke 17:20), and that it was within them when He walked on this earth (Luke 17:21).
It was for this very reason that the Pharisees and Sadduccees rejected Yeshua as the Messiah, because He was not going to do what they expected. They wanted an earthly king and an earthly kingdom to set them back up again as a world power and they were expecting to be part of that power base.
Christ told them He was taking the kingdom away from them and giving it to another people (Matt. 21:43; Acts 28;28).
An everlasting kingdom requires an everlasting - immortal - king; a king that cannot die. A king that cannot die does not live in this realm.
Christ was resurrected! That is the sign they were given, and is recorded for us to know and understand His eternal nature in heaven as our eternal, everlasting High Priest after the order of Melchizedek.
All of the book of Hebrews assures us the higher nature, the heavenly nature of His kingdom, and of His priesthood. Comparing Christ's eternal priesthood to those of the earthly Levitical priests, Heb. 7:23-24 states the reason why the kingdom is not of this earth.
"23 And they truly were many priests, because they were not suffered to continue by reason of death: 24 But this man, because he continueth ever, hath an unchangeable priesthood.” (KJV)
The earthly priests died. The eternal kingdom cannot be an everlasting "earthly" or fleshly, carnal kingdom because earthly men die. The ruler of the eternal heavenly kingdom that is in our hearts, within us in this earthly realm exists in heaven above, and is the highest authority over all of the earthly kingdoms of this earth realm.
The change that takes place after we have left our earthly tabernacle of our fleshly body transfers us from this earthly realm to the heavenly realm above.
"47 The first man is of the earth, earthy; the second man is the Lord from heaven.
48 As is the earthy, such are they also that are earthy: and as is the heavenly, such are they also that are heavenly.
49 And as we have borne the image of the earthy, we shall also bear the image of the heavenly.
50 Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption." ....
"53 For this corruptible must put on incorruption, and this mortal must put on immortality. (1 Cor. 15:47-50, 53 KJV)
That heavenly eternal kingdom was "at hand" when Christ was manifested on earth (Matt. 3:2; 4:17; 10:17, etc.) It was about to be established in that 1st century AD, and it was to be a kingdom that reigns in the hearts of men, over and above all kingdoms of men.
The victory over death, the last enemy (1 Cor 15: 26) is through the resurrection. Once we are baptized (immersed) into Christ and resurrected from that symbolic watery "death" we rise a new creature (2 Cor. 5:17) so that when we die we are just transferred / translated into our heavenly body and moved to the heavenly realm.
The "end" of 1 Cor 15:24 when He would deliver up the kingdom to the Father is not speaking of the end of all life on earth, nor the destruction of the entire physical realm / world. It was the end of the Mosaic covenant which still required the blood of goats and bulls to push forward the debt of their sins. But, that animal sacrificial blood could not take away sins (Heb 10:4). Only Christ's blood could do that.
Christ had a job to do. He had to buy us back, and redeem us to reconcile us to the Father. Think of this as a delegated task which Christ willingly took on. He came to do the will of the Father (John 5:30; 6:39). Once that task was done, once He paid the price of our redemption, and once He removed that physical temple in Jerusalem which was part of the task, then He reported back to the Father that it was done.
Delivering the kingdom up to the Father does not mean that Christ no longer rules. He finished that job, and now has another. God still gave His Son the everlasting priesthood of Melchizedek, and set Him up at His right hand to rule in the Father's kingdom. One task was complete, and another task took it's place. Christ is always doing the Father's will.
The "melting of the elements" in 2 Pet 3:10 is not speaking of the Greek elements of earth, air, wind, and fire. It is not the elements of the physical natural world. The Greek word is Strong's 4747, "στοιχεῖον", or "stoicheion", and it means "one of a row, hence a letter (of the alphabet), by ext. the elements (of knowledge)". Source: Biblehub.
The elements of knowledge were the law, the system of worship and sacrifice at the temple in Jerusalem. The same word is used in the context of being in bondage under the elements of the law in Gal. 4:3-5. The word is rendered as “rudiments” in Col. 2:8, 20 where the traditions of men, and ordinances of men are discussed. It is translated as “principles” in Heb. 5:12 for the first principles of the gospel.
The elements of the law melted in the fervent heat of God's judgment upon Jerusalem in the destruction of that temple that was set on fire on the 9th - 10th of Av in AD 70. For more discussion on these elements see my post "Frequent Mistakes - Part VI: The End of The World, or ???" here.
The everlasting kingdom is in power now over all the kingdoms of men, and Christ reigns eternally at the right hand of the Father (Rom 13:1). That is the higher authority which God established. (See my post "First Audience Perspective of Romans 13" here. Romans 13 is not being taught correctly either.)
"...To this end was I born, and for this cause came I into the world, that I should bear witness unto the truth...." (John 18:37, KJV)
"And he hath on his vesture and on his thigh a name written, King Of Kings, And Lord Of Lords." (Rev. 19:16, KJV)