God has a plan that lasts for seven thousand years. It starts with Adam and ends with the Great Day of Judgement. There is no possibility of his plan being changes.
In the eleventh chapter of Genesis we see the origin of Babylon, and in the last book of the Bible we see the destruction of that same rebellious city. Man as been in rebellion from the beginning.
The period in which the fourth kingdom exists has a mysterious two thousand year hole in it, that is, from the crucifixion of Jesus to the commencement of the ministries of the Two Witnesses of Revelation chapter eleven, it is as though the prophetic time clock has stopped.