It's too early to try to guess what will change and how. It is clear that the United States has the goal of establishing full control over the entire oil trade in order to prolong the existence of the petrodollar. That is, to continue to live as before. However, this is hardly possible anymore. As for the war against Iran, there is a danger of this war escalating into an open world war (which in fact is already underway, simply in the form of local wars).
Not only the war in the Middle East, but the war between Russia and Ukraine is also an open world war
In my opinion, these two proxy wars were essentially confrontations between the two most powerful forces in the world. On one side are the United States and its allies, whose goal is to maintain its dominance and petrodollar empire. On one side are Russia and China, both of whom want to break up monopolies and open up a multipolar world
No one want war to happen, but given the current political climate, it seems inevitable. Even if these wars do not happen in 2026, they will still happen in the not too distant future, IMO
In general, I agree with you. If a conflict with the direct participation of China begins, then the World War will become quite obvious. The threat is that nuclear weapons can be used by the parties. I don't know what the probability is, but it seems to me that it is quite high. Unfortunately, just as war is inevitable (for objective economic reasons), so is the use of the most powerful weapons (which, of course, no one would want).