Consider the following information about gospel preaching by the apostolic company:
- Philip preaches the gospel in Samaria: kingdom of God and the name of Jesus Christ (Acts 8:12)
- Paul preaches the gospel in Corinth: death, burial, resurrection, and appearances of Christ (1 Cor. 15)
- Paul preaches the gospel for three months in Ephesus: kingdom of God and the word of the Lord Jesus (Acts 19:8, 10)
- Paul preaches the gospel for a three-year period throughout Asia: kingdom of God and repentance toward God and faith toward our Lord Jesus Christ (Acts 20:21, 24, 25)
- Paul preaches the gospel for two whole years in Rome: kingdom of God and Jesus (28:23); kingdom of God and the Lord Jesus Christ (28:31)
Given this information about apostolic gospel preaching, did the gospel change from Samaria to Corinth from a message about the kingdom of God and Jesus Christ to a message just about Jesus?
If so, did the gospel change again from Corinth to Ephesus, Asia, and Rome?
Alternatively, has the gospel message always been the preaching of the kingdom of God and the name of Jesus Christ, and 1 Corinthians 15:3-5 was never intended to be used the way that many use it to define the gospel as a message solely about Christ?