The gospel message "evolved", the law and prophets predicted the death, burial and resurrection - even Christ spoke of this death:
Matt 26:2 “You know that after two days the Passover is coming, and the Son of Man is to be handed over for crucifixion.”
Jesus said the disciples knew. Whether that was relayed in the gospel message the disciples went out with we can't specifically say as the gospels are not totally inclusive of all that happened during that time. We can speculate on what is not said, but that's all it will ever be speculation