You are spot on with the Gospel being the one Jesus preached. The Gospel is about God's Kingdom and his plan to restore all things. Read Acts 3:19-21.

Personal salvation is only one aspect of the Gospel. The Gospel is about what God is doing and going to do. The restituition of all things so that God will be in all through all.

Sadly people know more about heaven or hell than they have heard about God's Kingdom and his amazing plans for the world.

But brother the spirit is stirring people. Many believers are starting to see Kingdom.