best chance currently for WWIII in my view...Bahrain....the Shia push harder, with Iran's backing ( Bahrain originally was part of Iran.) signs of this already have started this spring..though with less backing from Iran so far then what I think would trigger it....But when the do, the Sauds push back to hold there power with the Sunni lead, but Shia majority Bahrain....the fight in what will at some point in the next 20 years..someplace...be the major fight in the middle east of the Shia (Iran, now Iraq, Lebanon,) vs the Sunni lead side headed by Saudi Arabia...who the US will back. Russia will side with Iran but fund both sides where it can.
oddly WWIII in the middle east...has nothing to do with Israel...