Damn people, there shouldn't be so much rejection for this pairing here.
Anyhow, I'd like to point out that Karin is not a parallel towards Sakura, she is a parallel towards Naruto:
http://wishgrantingd...lized-something
http://wishgrantingd...aruto-parallels
I believe that Karin is gonna end up with Sasuke as the union of the bloodlines of the Sage give a symbolic meaning to the end of their conflict.
Yeah, I don't understand why SK gets compared to SS so much, if anything, it's a redux of part 1 SN, only difference is, this time the Uzumaki has romantic feelings for Sasuke instead of just platonic ones.
SK in the Kage arc is almost a direct parallel to part 1's Valley of the End fight. Right down to Sasuke sacrificing the Uzumaki for his revenge. He even failed to deliver the killing blow on both occasions. XD
Seriously, he even looks up at the sky in exactly the same way, with exactly the same expression on his face while contemplating dealing the final blow to the Uzumaki. In Naruto's case, Sasuke's thoughts were interrupted when he fell to his knees and started coughing up blood, in Karin's case, Sakura showed up and interrupted Sasuke.