IMO, FIFA has already lost and lost big.
This simply can not work with out the English teams no matter what FIFA says and there is no way in hell any English clubs will attempt a pure break away league again in the next ten years after that major kerfuffle.
I think the English clubs played it perfectly. They put their hand in the cookie jar, it got nearly cut off, they pulled back and said "I am sorry" and now will simply wait patiently until UEFA unveils their own version of the Super League in the next 5 years that has every ones backing.
I don't see any end game for the remaining 3 teams that are holding out. FIFA is absolutely toothless in this specific issue, which is why they even went to the lengths to use code names in the official Super League documents to try and hide their involvement.
If FIFA had even the remotest clout for the Super League, they would have been front and center, instead of hiding behind the curtain like the Great Oz.