You have to take that on a country by country basis.
The most screwed over nation right now is Yemen, both because of the civil strife, and their idiotically high addiction to a drug-crop that absorbs something like 40% of their water, when they’re currently in a drought.
I predict that, eventually, the two sides will split up again; the South and North will become their own entities.
Egypt is likely destined to go through a cycle of coups, much like Turkey had for much of the 20th century. It’ll take at least a generation for the up-and-coming generation to shake away the runaway MIC-regime, and build something else, but what that something else will be is hard to say.
The Muslim brotherhood is now a known quantity, and they didn’t get their power in a fair contest, but they are still popular there, and are now building relationships with other camps to antagonize the regime.
Jordan will remain stable I think, as it is one of the few countries to give its people an affluent lifestyle it can maintain. Same to the UAE.
Iraq is doomed de facto, if not de jure, to be split up along sectarian lines. The post-ISIS Government either does not appear to be willing to fix the problems that drove the Sunni Tribes to supporting ISIS, or it is completely inept at doing so.
There may be skirmishes with Kurds along “traditional” lands of theirs.
Oman and Kuwait share the same problem as the Saudis, in that they need to pivot away from oil revenues to sustain themselves. Kuwait is perhaps the most screwed over in this regard, and yet it can’t act unilaterally to fix it, as its King shares power with an opaque legislature system. Coalitions will have to form to want change to occur there, but I’m not sure if that’s happening.
Socially they’re more advanced than much of the Middle East; Kuwait because it has an integrated Shia and Sunni population, Oman because something like 70% of its people follow a rare version of Islam that embraces plurality. They’re the last vestiges of a branch other Muslims think of as “evil” because they were in fact the first takfirists. How that turned to becoming a more tolerant school of thought, I have no idea.
Turkey will likely keep Qatar safe from the worst of the blowback, but over the years, I see their prosperity suffering because of their ostentatious moves to try and take over the region. They most likely won’t be poor, but they probably hit their zenith.
Bahrain might have a revolution in the next few years. It’s a Sunni minority ruling a Shia majority, and it’s a probable flash point between Iran and the rest of the region.
And then there’s Syria… God knows.