I think nothing, besides God, would necessarily predate creation. I may not understand you on this.
I agree with you here; and so does the theory.
Sorry, I can be a bit dull but evil as a necessary inevitable reaction to God's creative action just doesn't follow logically in my mind. Creation as potentially evil due to the fact that its necessarily inferior to God, with an inferiority that can express itself in evil moral choices if and when free will is given to that creation (in the form of men or angels) makes sense to me.
What does not follow logically to you about evil being a reaction to God's creative action?
Creation is not "potentially evil" because God declared that it was "very good" upon the completion of creation (from a design standpoint). God obviously is still participating in the creative process by the fact that He still creates life as it "be fruitful and multiplies".
To say that God created something with a kernel of "evil" that makes it fall; would be to fault God with creating evil. God did not create evil; and I think you agree with that.
The manifestation of evil's existence in the creation is a result of choice of the creatures; but that choice is made because of evil's presence, not the creatures' will. The choice of the creatures did not create evil. Evil's influence caused their bad choices.
You follow me here?
And still, what form would this evil take that you speak of? What would contain it-and/or control it, or spread it, etc? How does it exist or manifest itself? Is it contained in a mind? With God or satan we have goodness and evil personified.
What form did evil take? Both Genesis and John calls it "darkness". I'm not sure if you are familiar with science's theory of "dark matter" or "anti matter" as being a counter to the presence of the material world; but as best as I can tell from Scripture, that's what I would "coin" evil as. "Darkness" is the presence of a malevolent chaos; is the best way I can describe what I think the Scripture tells us it is. I wouldn't even say it's "conscious" in the sense of it "making a choice".
Another possible explanation would be like Star Wars "dark side of the force". George Lucas never described "the force" as being God. He did not intend to make it a theological application. It was a concept he came up with as part of the story line of Star Wars and he did not want to get into theological arguments. The intent was entertainment, not to propagate the invention of a new religion.
The "force" in Star Wars has a "moral good" and a "moral evil"; of which, it
is utilized by choice of the creatures. So as you explained your understanding of creatures bringing "the dark side" to bear in the Star Wars universe by choices they make. Yet even in Lucas's concept of "the force", it ranks under the concept of a Deity that has over all control of the universe. In that sense "the force" is no different than the laws of physics.
Granted Star Wars does contain a lot of ideas from eastern religion and does not present any concept of an afterlife connected to a Deity. Still "the force" is a lesser thing than God in the Star Wars universe and Lucas made it as such for not wanting to spark theological controversy with the movie. It's entertainment; which if one looks at it in that venue, it is pretty benign.
So there is an example in current pop culture that may help clarify what "darkness" is in Genesis.
What contains or controls the darkness? God does and He's capable of doing so because He's omnipotent. What "spreads" the darkness? I'm not sure anything spreads the "darkness"; but choices of creatures do spread the manifestation of evil in the real world.
For example, if someone intends to commit mass murder by gunning down a bunch of people in a shopping mall; yet gets killed in a car accident on their way to the potential crime scene; evil has been limited because God took them out of the picture. Evil is "contained"; yet that did not stop the influence of "darkness" in the individual who sought to commit the crime. Now God does this all the time. He intervenes to control sin. He assigns government to that task. (Of course corrupt governments commit sin themselves; but God's intent for human governments is to control sin.
So, does this concept make more sense to you now?