The Reality of this Theory is based on one’s understanding of the story in Eden and the resolution in Revelation.
The choice at the Tree of Knowledge of Good & Evil was one of TRUST in God’s expressed will. This is the same issue that arose in Heaven that led to the beginning of war.
If the cosmic conflict, which was extended to the new creation (Earth), is intended to eradicate sin from all places forever (as suggested in The Revelation of Jesus Christ), then a few things need to be resolved and understood IN THE MINDS OF EVERYONE WHO LIVES IN ETERNITY.
God must have the full trust & faith of the inhabitants. The issue in the Garden was mistrust of God’s expressed will. That will was explained as life giving and it’s violation as deadly.
Sin (rebellion) must never recur. Every inhabitant of eternity must be thoroughly convinced that God’s will (as expressed in expansive acceptable choices) is for their good and that rejection of or deviation from those acceptable choices leads to death.
The inhabitants must be so thoroughly in love with God that they will heed their knowledge of Him and their knowledge of sin, thereby refusing to contemplate rebellion.
To accomplish this goal of creating such knowledge, both about God and about sin, the character of each must be thoroughly exposed and made available for examination.
In allowing sin to exist and be exposed, God Himself, along with others, must suffer the consequences of the destructive ravages of sin during the period of exposure.
In expressing & demonstrating His character, God’s own character limits His means and methods to those which maintain His integrity. Because of the distortions of perceptions, either innocently or deliberately created in the minds of others, God must repeatedly work out the expression of His own character within that character. He does this while meeting each one exactly where they are in their experiences and understandings of life.
Jesus’ life and death are the ultimate demonstration of both the character of God and the character of sin (rebellion). Despite that demonstration, there are still many who are blinded by the deceptions of others and so the war continues. He continues his efforts to bring everyone possible into relationship. But at some point, each will have eternally accepted or rejected His love and concern.
I’m certain other factors are involved in the resolution, but God’s ‘vindication’ is not for Himself, but for the benefit of every one who shall fill eternity. In order to have eternal peace and harmony, let every one be convinced in their own minds of the love of God and the goodness of His will.
“And the LORD God commanded the man, saying, Of every tree of the garden thou mayest freely eat: But of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die.” (GEN2:16-17.KJV)
"Now the serpent was more subtil than any beast of the field which the LORD God had made. And he said unto the woman, Yea, hath God said, Ye shall not eat of every tree of the garden? And the woman said unto the serpent, We may eat of the fruit of the trees of the garden: But of the fruit of the tree which is in the midst of the garden, God hath said, Ye shall not eat of it, neither shall ye touch it, lest ye die.
And the serpent said unto the woman, Ye shall not surely die: For God doth know that in the day ye eat thereof, then your eyes shall be opened, and ye shall be as gods, knowing good and evil. And when the woman saw that the tree was good for food, and that it was pleasant to the eyes, and a tree to be desired to make one wise, she took of the fruit thereof, and did eat, and gave also unto her husband with her; and he did eat.
"And the eyes of them both were opened, and they knew that they were naked; and they sewed fig leaves together, and made themselves aprons. And they heard the voice of the LORD God walking in the garden in the cool of the day: and Adam and his wife hid themselves from the presence of the LORD God amongst the trees of the garden.
And the LORD God called unto Adam, and said unto him, Where art thou? And he said, I heard thy voice in the garden, and I was afraid, because I was naked; and I hid myself. And he said, Who told thee that thou wast naked? Hast thou eaten of the tree, whereof I commanded thee that thou shouldest not eat? (GEN3:1-11.KJV)