All of Daniel's visions were about the same thing from different perspectives. Revelation visions are also about the same thing. It is about the end times which we are now.
It is not about the kingdoms mentioned but about spiritual kingdoms; that is God's kingdom vs satan's kingdoms which comes in the form of many many other kingdoms, you can call them religions.
It is true God's people will almost fall by the lies, almost believing the lies; they are saved from the lies through death. So it will appear as if satan's kingdom will rule over the world for a time as God's people fall but in the end, it is God's kingdom that will rule over because God's people do not sleep but are resurrected to indwell the living believers.