The difficulty that we all have is that which is limited by the revelation of the Scripture statements.
Beyond that, all is pure speculations.
The Hebrews states that "whoever would draw near to God must believe that he exists and that he rewards those who seek him."
So we all would admit that He exits, and that, in our being conformed to time and place, we do not have the capacity but to fantasize much beyond that.
We do know that this earth as originally created is not as it presently appears. That is from the opening of the Genesis. The sky (heavens) and the land (earth) were created. How did the perfection of Creation become a desolate thing in ruin ("without form, void")? The water, the land under the water, noting living, nothing of value (Genesis 1:2 a worthless thing).
Genesis lays out the facts, it does not go into intricate details. It lets the believer know that God does nothing without purpose and plan. He is taking that which is worthless and redeeming it for His own will. Bringing that which is of confusion and no substance to new life and to Himself. I am but dust. Worthless discard. Yet, He redeemed me.
Therefore, in my fantasizing, and because we know that God didn't suddenly become a creator, I would think that there have been a vast innumerable creations of eternity. Those in which God displayed totally for His pleasure. This one is special. This one He had to redeem.
Fundamentally, humankind, are limited to what God reveals of Himself.
And it is fun to fantasize, as long as we all understand that fantasy is not the assurance of facts.