Interesting article, here.
My video on Who speaks for Islam, here
I'm pretty sure WWIII started when ISIS took Mosul at the end of last July, which was the centenary of WWI, and very analogous to the assassination of Archduke Ferdinand, in that the even though heinous, didn't seem like it ought to start a world
This is the phony war stage, where the allies join and divide, and here I think it will fall along whether alliance is with Saudi, or Iran. Eventually when enough sides choose, we'll have a world war, but how much of it will be our troops fighting, I don't know. Precursor to Armageddon, I don't know.
The side the US picks will determine the fallout of the rest. Right now we are uncommitted, and seem to stand off, which I hope we continue to do.
We should terminate the agreement with Iran, though, and make a public statement that we back Israel in whatever she wants. That sends a shot to the Iranians who know well that Bibi wants to bomb their nuclear facilities. Moscow would stand off because they don't really want Iran to have nuclear munitions, same for China: both countries have large Muslim minorities so they are only nice to Iran to keep those minorities quiet.
So now we see a formation: Russia and China SEEMING (lukewarm though) to back Iran, and US backing Saudi also being lukewarm, standing off (clear idea that we back ISRAEL so Saudi, you better be nice to her
). Saudi is already making nice with Israel, as is Turkey, though the official policy of both is to kill her. That, because the ISIS group and the Yemeni problems can be shifted back to their control rather than Iran's, so first let's get rid of the devil we know.
(Both Turkey and Saudi support ISIS too, but factions within it; Iran supports other factions.)
So now you can see where Europe, Canada, Britain, Africa, and Latin America will go. Europe will try to stand off, Britain will side with US, so likely will Latin America; Africa and Asia will be a patchwork (China has a lot of influence there, both continents).
Thus it can develop into WWIII officially, but not overnight.