I looked at the earth,
and it was formless and empty;
and at the heavens,
and their light was gone.
I looked at the mountains,
and they were quaking;
all the hills were swaying.
I looked, and there were no people;
every bird in the sky had flown away.
That speaks of what we find the results for in Genesis 1:2.
Jeremiah 4:23-25 indicated that there were a type of humanoid living in the previous world. That creation was utterly destroyed and these "people" existed no more. Cave men types of which we now find fossils. The Hebrew uses a very generic term for "man."
What makes man now so special is the when God created our souls? He created our soul in His image. The previous humanoid was a highly developed creature that did not have a soul designed for eternal life. Evidently, that humanoid was the most intelligent creature of that world, but not the biggest and strongest.
Keep in mind, if God can take a prophet throughout any point in time.. Like He showed Moses the establishment of this current world? God could give Jeremiah a glimpse into prehistoric times! Just like Job saw prehistoric creatures that the cave men could not harm. Scholars are still perplexed about those Job passages. They forget that when God moves a person time ceases to be a prison. God can translate a person's mind into the future, and the far distant past! Job saw dinosaurs that men's weapons could not harm. Are you familiar with those Job passages?