I don't believe; ""Protevangelium," the first gospel."" (quoting you above), was the first gospel in Gen 3:15. It was the CURSE for breaking the 'first covenant' of 'don't eat of the tree of good and evil'. They Adam/Eve both did eat, and they both lost immortality. IOW they both were going to "surely die" BECAUSE they were kicked OUT of the Garden and no longer had access to the fruit of the tree of life and they were going to die in the flesh, as a consequence.
Yes, there was more in store for all of humanity which was created BEFORE Adam was removed from WEST EDEN by God. The same God who placed the 'spirit of Christ' in Adam ONLY and not the rest of the Pre Adamic race ("host") which were created in Gen 2:1.
"host" = SRN 6635 tsaba': a mass of persons (or fig. things),espec. reg. organized for war (an army); by impl. a campaign, lit. or fig. (spec. hardship, worship).
The first 'son of God' was "formed" by God out of that 'mass of persons' Gen 2:7. And God put a christos/anointed spirit into Adam making him the FIRST 'son of God' (not born of a woman Luke 3:38). God THEN went farther EAST in Eden and planted a garden Gen 2:8. Then God went back and got ADAM out of the pre Adamic race "host" and put him in the "Garden.." which was farther "..eastward in Eden" Gen 2:8.
This is already plenty to deal with, if you've never heard or studied it before.
Pre-Adamic race---LOL. Whatever studies you did, you obviously didn't take the time to employ any critical thinking first, though.
Let's assume Genesis 1:26-28 is meaning this pre-adamic race that precedes the account of the formation of man in Genesis 2. We'll call this account, A).
Then let's assume Genesis 2:7, 21-25 is meaning this Adamic race that is formed later. We will call this account, B).
The first thing to note is that nowhere per A) does it ever say anyone is formed from the dust of the earth. Nor does it say that anyone was ever made a living soul. Likewise, per B) nowhere does it say that anyone was ever created in the image of God. These are relevant points to factor in, as I will demonstrate here shortly.
But let's start with A)---male and female created he them. The first question that must be asked---is a female human and a woman the same thing? Why this matters is simple---she shall be called Woman, because she was taken out of Man. Can't apply that to A) if A) is meaning before B) rather than equals B). Imagine that. There were already female humans before Eve was formed, except none of them were women. What were they then, if not women?
Ecclesiastes 3:20 All go unto one place; all are of the dust, and all turn to dust again.
Ecclesiastes 12:7 Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it.
Can't include anyone from A) since none of them were ever formed from the dust of the earth. It only says that of the man formed per B). Imagine that. When these of this alleged pre-Adamic race pass away, none of them ever go into one place, because none of them are of the dust, thus none of them turn to dust again. I guess 'all' per that verse doesn't literally mean 'all'. It means only some.
Genesis 9:6 Whoso sheddeth man's blood, by man shall his blood be shed: for in the image of God made he man.
This is not applicable to the man formed per B) since it never says that man was created in the image of God. Therefore, only the pre-Adamic race per A) is meant here. But the funny thing about it though, Noah clearly descended from the man formed per B).
And finally, the fact you argue that the host of them is only meaning the pre-Adamic race created per A), we are then to believe that 'hosts' can only mean humans in vast numbers?
Deuteronomy 4:19 And lest thou lift up thine eyes unto heaven, and when thou seest the sun, and the moon, and the stars, even all the host of heaven, shouldest be driven to worship them, and serve them, which the LORD thy God hath divided unto all nations under the whole heaven.
Deuteronomy 17:3 And hath gone and served other gods, and worshipped them, either the sun, or moon, or any of the host of heaven, which I have not commanded;
We are to believe that vast numbers of humans are meant by the host of heaven in these 2 accounts?