The Antichrist's empire described in Eze 38 and 39 is all muslim today. There are no signs of any of these nations abandoning their Islamic foundations, instead they are becoming more radical.
Eze 38 lists the nations of this final beast empire. The antichrist here is referred to as Gog.
And the word of the Lord came unto me, saying,
2 Son of man, set thy face against Gog, the land of Magog, the chief prince of Meshech and Tubal, and prophesy against him,
3 And say, Thus saith the Lord God; Behold, I am against thee, O Gog, the chief prince of Meshech and Tubal:
4 And I will turn thee back, and put hooks into thy jaws, and I will bring thee forth, and all thine army, horses and horsemen, all of them clothed with all sorts of armour, even a great company with bucklers and shields, all of them handling swords:
5 Persia, Ethiopia, and Libya with them; all of them with shield and helmet:
6 Gomer, and all his bands; the house of Togarmah of the north quarters, and all his bands: and many people with thee.
7 Be thou prepared, and prepare for thyself, thou, and all thy company that are assembled unto thee, and be thou a guard unto them.
Ezekiel describes how Gog will come against and invade a land that sounds very much like the modern country of Israel.
Get ready. Be prepared. Take command of the huge armies that are gathered around you. 8 After many years you will be called together to fight. Later, you will march into a land that has not had war for a while. Its people were gathered together from many nations. They came to the mountains of Israel. No one had lived in those mountains for a long time. So the people had been brought back from other nations. Now all of the people live in safety. 9 You, all of your troops and the many nations with you will march up to attack them. All of you will advance like a storm. You will be like a cloud covering their land." Eze 38
Ezekiel gives us the specific names of countries that will invade Israel. Gog is identified as the one spoken of by the prophets in ancient times.
16 And thou shalt come up against my people of Israel, as a cloud to cover the land; it shall be in the latter days, and I will bring thee against my land, that the heathen may know me, when I shall be sanctified in thee, O Gog, before their eyes.
17 Thus saith the Lord God; Art thou he of whom I have spoken in old time by my servants the prophets of Israel, which prophesied in those days many years that I would bring thee against them?
18 And it shall come to pass at the same time when Gog shall come against the land of Israel, saith the Lord God, that my fury shall come up in my face.
Eight nations are mentioned as part of Gog's empire. All except for Persia [Iran] are named after sons [grandsons] of Noah.
Where did Noah's sons and grandsons settle? Mishech and Tubal traded with ancient Tyre, concluding that they are in modern Turkey, northern Iran, and Southern Russia. Today this region is Islamic. Magog is today the Islamic soviet republics and parts of afghanistan. Some say Magog is Syria. Persia is easy, that's Iran. Cush borders Egypt, the nation of the Islamic Republic of Sudan. Put is the nation of Libya. Gomer is known as ghimorrei, central Turkey. Togarmah is also Turkey, SE Turkey near Syrian border.
Five of the 8 nations occupy modern Turkey and some southern Russian Islamic republics. Israel is surrounded on all four sides by nations of Islam.
Revelation 17 describes the final beast kingdom, the eighth, that will invade Israel before the return of Jesus.
And I saw the woman drunken with the blood of the saints, and with the blood of the martyrs of Jesus: and when I saw her, I wondered with great admiration.
7 And the angel said unto me, Wherefore didst thou marvel? I will tell thee the mystery of the woman, and of the beast that carrieth her, which hath the seven heads and ten horns.
8 The beast that thou sawest was, and is not; and shall ascend out of the bottomless pit, and go into perdition: and they that dwell on the earth shall wonder, whose names were not written in the book of life from the foundation of the world, when they behold the beast that was, and is not, and yet is.
9 And here is the mind which hath wisdom. The seven heads are seven mountains, on which the woman sitteth.
10 And there are seven kings: five are fallen, and one is, and the other is not yet come; and when he cometh, he must continue a short space.
11 And the beast that was, and is not, even he is the eighth, and is of the seven, and goeth into perdition.
12 And the ten horns which thou sawest are ten kings, which have received no kingdom as yet; but receive power as kings one hour with the beast.
There are seven beast kingdoms. These are kingdoms of Satan. John gives us a way to identify the last beast kingdom before the return of Jesus.
Five are fallen when John is writing:-- Egyptian, Assyria, Babylon, Medea-Persia, Greece,
One is-- Roman
The other is not yet come-- Ottoman Empire
This last one, the seventh, will be mortally wounded  and revive at the end times [has not happened yet] as the eighth.
The ten horns are ten kings of countries that the Antichrist will rule over as an Empire [caliphate].