We are told in the story of Genesis that God created Man and Man sinned. We are told in various other places of the Bible that God provided Forgiveness for Man.
It is at least implied that before Man there were Angels who followed Lucifer in a rebellion against God. This implication I understand is vehemently disagreed with by many...yet for the sake of the thread, I ask that you consider the premise, for without it the question is moot.
If God has provided a way for Man to be forgiven...in essence, has forgiven Man...one might reason that God would also Forgive Satan and the Angels that followed after him.
Is it possible then that God created Man as a reincarnated fallen angel? No one knows how many angels followed after Lucifer, perhaps billions? Trillions? So...perhaps Man IS the forgiveness for the Fallen Angels...that Man is the Fallen Angel incarnate given a second chance. Thoughts?
