If Medinat Yisrael falls (not impossible,especially if the Muslims ever unite, and if the western world including the United States becomes more influenced by growing Muslim populations and openly supports the Muslims against Israel), Satmar will be seen as the ones who were right all along.
If the Medinah manages to make peace with the Muslims, which will allow normal relations and most importantly, abolition of conscription, Satmar will be irrelevant politically, and will become just another hasidic group.
However as long as Eretz Yisrael is ruled by zionists committed to war with the Muslims, and to coercing Jews to distance themselves from Torah, Satmar will remain politically important.