Ss will get happy ending because the consequence of their ending, kishi asspull, and there's no way they will make tragic ending in shonen manga. There are already past that stage.Didn't you always said that SS will get happy ending no matter what at the end of this gaiden?
I mean not just 3-4 times here alot lot many times. That means you unconsiously
Kishi will pull happy ending out of his ass, because kishi logic is not logical.
I don't give a kitten if they get happy ending with sasuke bring flower in white horse and sing like Bollywood movie. It will not change the fact That pairing is bad.