When the Bible says Jesus preached the Gospel of the Kingdom. Is the Gospel salvation in Jesus only as in his death and resurrection? Is that gospel of the Kingdom more than salvation? What do you think?
Yes, it is more.
Christ's Salvation Plan is The Father's Salvation Plan, both are one and the same. It's just that what is contained in that Salvation is not often taught in most Churches. You have to learn about it for yourself in study of all of God's Word.
He is going to restore the kingdom of Israel as in its days of old, that's one of the major events of His Salvation.
He will establish Gentile kings in His Salvation also, which means the idea of nations on earth will still exist.
He is going to change the earth, moving mountains by flattening them, and raise valleys, and His River will feed and heal the waters upon the earth, cleansing them.
He will establish a perfect creation, as the tree of life will bear its fruits according to its months, and it will bear fruit perpetually, never being consumed up.
No more hunger, no more thirst, no more death. The idea of everlasting will be upon everything.
We will never die again, won't be subject to hot or cold, nor learn war anymore.
There will be no more sea (oceans and such), which points to a lot of the waters covering 70% of this earth will be moved to another location, up in the sky most likely, plugging the holes in today's sky around the earth. This will create a greenhouse with even temperatures around the earth, no more hot or cold spots. The earth will become literally a Paradise like His Garden of Eden.
Wild animals will no longer kill, the lion and the lamb will sit together and eat straw (herbavores instead of carnivores).
Wickedness and sin will be no more, for God will create us a joy.