Thats right Peter. John was under the Roman Empire. The next kingdom which is the last had (has) not emerged yet to show us who they are exactly....they continue a short space. So it is not that same Roman Empire which is to come.
But we know they are the kings of the North. North of Jerusalem. They did not use north west, north east etc in those days, but they are North of Jerusalem (Europe) and there will be 10 leaders who will unite as one strong mighty powerful beast (empire) with one army, one currency, one law, one religion....one leader who will soon after gain control of the whole world. He is the false prophet and this is where he emerges from (Europe)