Gram, I mean in the next TES game, it may have some reference towards the civil war. I'm saying who won it in Bethesda's book?
I really doubt they've established that yet. I mean, they'll likely wait until they're making firm progress on writing the story of the next game to decide for sure what the outcome of the war will be.
Hopefully, the course of the war will be "The Empire and the Stormcloaks discovered what the Thalmor were up to, established a truce and alliance and the entire Empire invaded the Summerset Isle, crushed the Thalmore, and re-established order. Then crushed the Thalmor some more, just for good measure."