Even so, occasionally God let his plan "slip out" before Paul's time.
David let the cat out of the bag with these gems .......
All the ends of the earth will remember and turn to the LORD, and all the families of the nations will bow down before him, for dominion belongs to the LORD and he rules over the nations. Psalm 22 : 27 - 28 TNIV
All the nations that you have created will come and bow down to you; they will praise your greatness. You are mighty and do wonderful things; you alone are God. Psalm 86 : 9 - 10 GNB
The LORD is gracious and merciful, slow to anger and abounding in steadfast love. The LORD is good to all, and his mercy is over all that he has made.
Psalm 145 : 8-9 ESV
And Isaiah added his share with these ......
On this mountain the LORD of hosts will make for all peoples a feast of rich food, a feast of well-aged wine, of rich food full of marrow, of aged wine well refined. And he will swallow up on this mountain the covering that is cast over all peoples, the veil that is spread over all nations. He will swallow up death forever; and the Lord GOD will wipe away tears from all faces, and the reproach of his people he will take away from all the earth, for the LORD has spoken. Isaiah 25:6 - 8 ESV
"Turn to me now and be saved, people all over the world! I am the only God there is. My promise is true, and it will not be changed. I solemnly promise by all that I am: Everyone will come and kneel before me and vow to be loyal to me. Isaiah 45: 22 - 23 GNB
All mankind will come to worship Me, from one New Moon to another, and from one Sabbath to another," says the LORD. Isaiah 66: 23 HCSB
Maybe this is what God has been up to all the time. It is not a new idea coming from some heretic Christ-followers of the late 20th and early 21st centuries after all.