The proxy war between Shia/Persia and Sunni/Saudi Arabia is raging sinc eyears, and before. It is no possibility, it is an ongoing fact.
Here is a sober assessment of the American and Iranian positions. The author is so sober in his assessment that one wonders when the last year was that he has had a drink. Good.
https://www.bbc.com/news/world-middle-east-48298517