Are you saying that the gospel mentioned in the following verse is the same gospel which Paul mentioned at 1 Corinthians 15:1-4?:
"And they departed, and went through the towns, preaching the gospel, and healing every where" (Lk.9;6).
Since the twelve did not even know that the Lord Jesus was going to die until later (Lk.18:33-34) it is obvious that the gospel which they were preaching was not the same one found at 1 Corinthians 15:1-4.
So are you saying that the Tweleve were accursed for preaching the gospel which they did at Luke 9:6?
There is only one Gospel of Christ.
Jesus sent His disciples at the first to preach the end result of the Gospel and later sent them to preach the means of its fulfillment.
LA