Sorry so loooooooong
I think that Nebuchadnezzars dream in chap. 2 and Daniels dream in chap. 7 are parallel. The great colossus of gold, silver, bronze, and iron and the four beasts seen by Daniel.
Head of Gold - Lion with Eagles wings.....Babylonian Empire
Chest and Arms of Silver - Bear.....Medo-Persian Empire
Waist and Thighs of Bronze - Leopard with 4 wings.....Grecian Empire
Legs of Iron - Dreadful Beast with iron teeth and 10 Horns.....Roman Empire
It is usually taught that only the Roman Empire will emerge at the end of the age, but one does not completely destroy the other. I think that all four monarchies are to run on in some form until Jesus comes.
1) Daniel tell Neb. that in his dream that God would be revealing "what shall be in the latter days" (Dan. 2:28). It is not just the feet and toes that are in view, but the entire image - all four empires.
2) When the stone (or Christ) smites the image on the toes at the end of the age, the entire image collapses. "Then was the iron, the clay, the brass, the silver, and the gold, broken to pieces together, and became like the chaff of the summer threshingfloors; and the wind carried them away, that no place was found for them" (Dan. 2:35). Since the entire image is destroyed, all that the image depicts must be in existence at that time.
3) In connection with the judgement of the four beast empires with occurs at the end of the age (Dan. 7:9-10), it is stated that the fourth beast empire is destroyed, however, "the rest fo the beasts, they had their dominion (or power) taken away" (Dan. 7:11-12. For their dominion to be taken away at the end of the age, it requires that they still be in existence.
The Babylonian empire was defeated by the Medo-Persian empire, but it did not cease to exist. The Medo-Persian empire was defeated by the Grecian empire, but it did not cease to exsist. The Grecian empire gave way to the Roman empire, but it did not cease to exist. The Roman empire corrupted itself and finally lost control, but it did not cease to exist.
The ancient Babylonian empire is modern day Iraq
The ancient Medo-Persian empire is modern day Iran
The ancient Grecian empire is modern day Syria
The ancient Roman empire is ? EC? UN?