Narrated by Ibn Maajah in as-Sunan (no. 4084)
“Three will fight one another for your treasure, each one of them the son of a caliph, but none of them will gain it. Then the black banners will come from the east, and they will kill you in an unprecedented manner.” Then he mentioned something that I do not remember, then he said: “When you see him, then pledge your allegiance to him even if you have to crawl over the snow, for that is the caliph of Allah, the Mahdi.”
That's the full hadith, it appears to be 3 different son's of 3 different rulers in the Arab world which will plunge the middle east into turmoil.
There is Ikhtilaaf over which treasures they will fight over (Kaa'ba, Euphrates gold) there is more evidence for the Euphrates gold.
The next major sign to appear is the drying of the Euphrates, the secularist Turks have several dams already set up (river starts in Turkey) from were they can shut the water flow entirely.
Expect the secularist Turks backed by the West to do this once they dispose of Erdogan and these secularist really hate Arabs.
If you observe the Euphrates river today, on the East side of the river in Syria you have the US Army and there puppets composed of mainly Kurds.
On the West side of the river is the Russian army with there Shia/Nusayri puppets.
The battle lines are already drawn out, and there is a reason why both super powers are there, and I take the hadith about the Euphrates Gold literally as Gold (not oil which other hadiths mention)