Yes...That's why there were disciples wandering around who had heard the gospel of the Kingdom but had no idea of the mystery revealed to Paul, the gospel of the grace of God, which is Christ in you, (Col.1:27)...
Act 19:1 And it came to pass, that, while Apollos was at Corinth, Paul having passed through the upper coasts came to Ephesus: and finding certain disciples,
Act 19:2 He said unto them, Have ye received the Holy Ghost since ye believed? And they said unto him, We have not so much as heard whether there be any Holy Ghost.
Act 19:3 And he said unto them, Unto what then were ye baptized? And they said, Unto John's baptism.
Act 19:4 Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him which should come after him, that is, on Christ Jesus.
Act 19:5 When they heard this, they were baptized in the name of the Lord Jesus.
Act 19:6 And when Paul had laid his hands upon them, the Holy Ghost came on them; and they spake with tongues, and prophesied.
The gospel of the physical Kingdom with a physical King is the gospel that John the Baptist taught and is the gospel that will be preached during the Tribulation...
These people will then be under the law and will have to endure to the end (Mat 24:13) and overcome with good works (Rev 2:26)...And those are certainly not Eph 2:8,9...
You are EXACTLY right, Iscool. Sometimes I think we need a starter course for the Book of Acts, showing exactly what people were doing from the beginning to the end of Acts. TO sort it out and untangle the mess that religion has gotten us into, trying to make one thing fit another when it isn’t SUPPOSED to fit, it’s DIFFERENT. FOR A REASON. God’s reason. It’s HIS timeline for man. Not ours.