The Gospel of the Kingdom is preached in the beginning of Revelation (144,000 Jews, 2Witnesses, Angels) then the end (Matthew 24:15-31, Rev. 15-20)
We do not preach the Kingdom Gospel today, we preach the Gospel of the grace of God (1Cor.15:3-5)
Depends on the preacher one is listening to, in my experience.
Or perhaps how it's framed. I've heard sermons combining the two.