The beast that was, and is not, and shall..
John was speaking about a time in the past, (that was) Rome was in power so that negates a beast "that was." And is not...That negates Rome since it was at the peak of it's power when he wrote it.. and shall... The beast that arises in the future cannot have anything to do with Rome since the first two sections of John's statement eliminates Rome from being the future beast. If someone prophesy's about something that's already in existence that makes them a false prophet.
Revelation 17:8 the first part, is talking not about an empire, such as the Roman empire, but an individual who lived before John's time but was dead at the time of John... was then and presently still is in the bottomless pit.
Revelation 17:8 the second part, is talking about the end times Antichrist, a person living in our generation.
The prince who shall come was fulfilled in AD 70. I don't believe that's the man of sin since I don't accept the gap theory of Daniel's 70th week. And I'm not a preterist. I just don't accept that view of Daniel 9.
Here's a challenge for you.
Do you acknowledge that there has been so far, a 2000 year gap between Jesus's first coming and his second coming?
Quote one verse of prophecy where Rome is specifically implied.
Not as the beast in Revelation 17. I don't hold the view that the beast is an empire in that chapter. However, in the dualistic representation in Revelation 13, the first beast is of an individual and an empire.
The empire part is easy to prove because of the component make up of the
bear, leopard, lion referring back to Daniel 7, which in turn, ties back to Daniel 2 the four empires, which Rome was the legs of iron.
In Revelation 13, with 42 months left before Jesus Returns, the end times version of the Roman Empire, the EU final form, will have gained control of the territories of the other three historic empires, basically the oil producing states in the middle east.
The king ruling at the time of John (the sixth of the seven prophesied kings) was a Roman emperor - so I don't know why you think Rome is not implied.
I can prove Islam is the religion of the two horned beast and that it will produce the man of sin.
But that's for another thread.
You can't if you research Islam to know that they are not to worship the Mahdi or any kind of image, which the second beast has made of the first beast.
Doug