"The good news that a child would be born to redeem mankind is the same gospel by which we today may be saved from God's wrath. As Adam and Eve looked forward to that child, we look beck upon him, Jesus Christ, who died for our sin, rose again, and ever lives to intercede for us. This is the gospel, the good news of God's grace. Though we are doomed by our disobedience, and though we cannot save ourselves, God promises in Genesis 3 that he will give salvation as a gift, the gift of the child." - Frame, ST, p66.
I'm always looking for ways to see the connections between the Old and New Covenants. Of course, the Covenant of Grace is the means by which we can do this; the gospel that now looks back once looked forward. But it is the same gospel; the same good news.