I think most Christians here, who believe in future events yet, agree who this world leader is, and I concur. The end times has many signs to watch for and we are told to watch by Jesus.
Some things that I watch for are (but not limited to):
1) A rise in natural disasters, earthquakes and the like. They are increasing in frequency.
2) Political events, namely, the formation of the "King of the South" alliances which with the terrorism and whatnot these days we see happening now, and a future union of the North, and "King of the North" aka the beast or Anti-Christ. This is not as obvious yet, considering the beast, "the Assyrian" has not openly manifested yet. Expect a 10-nation (king) confederacy and Germany rising to power again.
3) Religious events implying a false prophet. The bible speaks of the beast and false prophet together. This is the harlot church, and BTW any church that is mainline is a serious candidate. Jesus called us a "little flock".
4) Israel: I'm talking about the land and Jews returning although Jews are not all of Israel. There's other tribes too (c.g. Romans 9:6). Nevertheless, there's talk about these blood moons lately. Moons, per se, do not predict anything, and I am not claiming these are the moons in Joel or end times... rather a precursor. However, God does use calendar and heavenly signs in the same manner when we have a ten o'clock appointment the big hand is straight up and little hand pointing upward left to the 10. When we see that, then it's time to go. The first tetrad this past century was associated with regaining the land. The second one in the 60's the recapturing of Jerusalem, and I predicted (along with others) that this one has to do with the temple and I see more news than ever before on the temple. Everything is ready: blueprints, articles, priests' garb, they are trained, they are also raising red heifers. The only thing stopping them is the politics of the mount. So watch for the temple being built, because beast will then do that abomination thing and seat himself therein. The temple that man makes will be for the beast to desecrate and destroy again. Just keep that in mind. The temple is merely a sign to watch for.
5) And of course, the rise of general apostasy and low morals. Most Christians see this first since the tendency is to look within and subjectively with most. But the outward signs reflect the inward workings. Therefore, one can also distinguish by the outward signs mentioned in the bible. I have scripture and historical events for all these points I mentioned, so if anyone has a question "where I got that idea from".