As I said above, everything is about what the US will be at the end of the century. China and the US are too main players who can compete globally. But the world won't be as it was during the Cold War, when there were two dominant powers and the members of the respective blocs depended almost wholly on them.
The world will be multipolar in the sense that there will be a number of regional players who will have a significant influence in their spheres. And the dominant powers will have to seek for common interests with them.
What these regional powers will be? Take a look at G20 with some exceptions and additions.
Looking just at the G-20 is not enough.
You have to consider the sustainability of their economic well-being.
Middle-East is rich in oil, but not in natural gas.
Natural gas will play an important role in the future, but oil will decrease its role.
Places like Saudi-Arabia, UAE will revert back to deserts without a serious push towards technological progress.
Then you have to look at the cultural narrative of the countries to impact their surroundings. What's their narrative ?
"Our borders have been drawn by imperialists after WW1 rather than our own blood, before USA's appetite for oil after WW2 all our lands were deserts, now we've shiny cities like Dubai and we're behaving like newly-rich pricks instead of using the wealth for the well-being of Muslim communities in the region".
All those monarchies are hated by their own people. These countries are all standing in line for major socio-economic change.
All they can do is funnel money into Washington swamp, American defense industry and buy favourable articles in the American press.
If that's not enough they'll try to buy Israeli support with "peace agreements" for when the day comes the USA will support their dynasties against their own people.
Alliances by those countries are just paper-alliances, they can't send one single soldier abroad without social unrest. Their whole security apparatus is designed to oppress their own people than fighting wars abroad. That's why I'm not concerned by phrases from users like
Picaro that Turkey is creating enemies. If many loosers join forces together they still don't make a formidabble enemy. Trump himself said, that Saudi King will fall in 2 weeks without US support.
Turkish narrative on the other hands is simple: "We came here without natural ressources, we care for Palestine, the Rohingya, the Uyghurs, the Syrian refugees and all oppressed Muslims and the people of the region". All whilst TSK is launching one expeditionary operation after the other.