My guess is that SCOTUS will rule that they do not have standing. "Standing" is the right to file a lawsuit because it directly harms you. That would let the ban go ahead. TBH, the government should simply tweak the language on visas and then make that directive.
Incidentally, the most liberal appeals circuit (9th) always get's overturned. Can you believe they get overturned by SCOTUS 80% of the time? That's just insane.
That's why they had the state of Washington pull the case cause they are apart of the 9th circuit court of appeals. Yeah it's like 60-80% gets overturned by the suprem court. Its crazy.