Good news. But America and Israel will sabotage it.
Mate, I am a history buff, I grew up with Saudi Arabians and almost every nationality from the Muslim world.
You know what happened in the real world? During the 1960's and 1970's at the height of the late Shah's modernization/westernization project of Iran
side comment:
You know the few photos of Iranian women in Tehran that pro-Western and anti-Islam Iranians use of Iranian women in mini skirts etc. to somehow try to pretend that this was a representative picture of Iran in 1979 (where there was widespread illiteracy) etc.
, Saudi Arabian kings warned him that Iran is a majority Muslim country and that steps should be taken in a cautious and intelligent way rather than by force. This was after the Shah wrote letters to Arab monarchs and ask them to open up for Westernization or risk being overthrown.
There is famous later written by the late Iranian Shah (Reza) to King Faisal.
When the Shah was forced into exile (To Arab countries no less - see Kuwait and Egypt), the first thing the Arab monarchs (KSA in question) did was to write a congratulatory letter to Khomeini where they stated their renewed hope in further improving bilateral relations.
In return Khomeini was propagandizing how those rulers were like the Shah (using the Iranian experience of theirs which was not present in KSA or elsewhere) and needed to be removed.
This kickstarted the current day conflict.
The Iranians blame Arabs (KSA and others) for Saddam's invasion of Iran in 1980 but that had nothing to do with Arabs. Other than the Arabs (naturally) supporting their own over that of a newly regime that publicly called for their removal and were actively sponsoring unrest in their countries.
And Iraq-Iran hostilities pre-date Mullah's and where already very bad during the Shah during to the Shat al-Arab dispute and other disputes and accusations.
So I am afraid that West is not needed for their to be rivalry/hostilities. Using the West/Israel all the time as an excuse is partially why the Muslim world is in the state it is in, too may conspiracy theories, too little critical thought process and too much blind beliefs in regimes and their actions or lack thereof.