I believe redemption is the result of penal substitution. Foreordained before the foundation of the world,One, who would not deserve to die, would come into the world, born of woman, born in the likeness of sinful flesh, yet without sin, born lower than the angels, because of the death, but would die, be substitute for the sinners.
What death, the death the devil had the power thereof before the man was created.
But one in a certain place testified, saying, What is man, that thou art mindful of him? or the son of man, that thou visitest him? Thou madest him a little lower than the angels;
Both men are singular. Both are made lower than the angels, One is the first man Adam the other is the last Adam. Both died.
One has been quickened from death.
The target from before the foundation of the world and presently is the devil and his works.
Show me from scripture where from before the foundation of the world that the plan wasn't for first man Adam to sin and bring death the death and for the last Adam to not be the the one to destroy death and the devil.
1 Cor 15:26 ἔσχατος ἐχθρὸς καταργεῖται ὁ θάνατος.
Not physical, not spiritual, just, the death.