... weirdos.
What's all this 'sage power' crap? The similarities between Naruto with this Tailed Beast Mode and the Sage, the cloak/tomoe markings etc is all very... compelling. But note how Minato looks exactly the same.
Minato is not an Uzumaki.
Regardless - just because Karin is an Uzumaki does not mean she will suddenly develop the Rinnegan and start a solo-mission to end the war with 'Sage power'.
If, by deductions alone you believe that Uzumaki = Sage then... you're a retard.
Kushina was an Uzumaki.
Uzumaki/Senju are (apparently) descendents of the ’first son’ - note Tsunade is not rockin' a pair of Rinnegan eyes, nor is Tobirama or Hashirama.
Uzumaki - Senju - as a branch off the first son, they got the 'body' so I don't know why the would suddenly develop the 'eyes' which were passed onto the 'second son'.
... Uchiha are descendents of the 'second son'.
An entire clan full of people, none of which we know of have naturally developed the Rinnegan.
Madara did by injecting Hashirama's cells and I'm not 100% sure if it required his cells alone due to his Wood Release/Sage abilities or just because he was a Senju alone.
The only one with any definitive Sage of the Six Paths... likeness, would be Naruto.
Due to;
a) physical appearance/outline
b) markings gained in Tailed Beast mode
c) prophecy by toads
d) his coming foretold by Sage to Tailed Beasts
Karin... if a bullshit piece of fodder with absolutely no redeeming features nor admirable qualities. Sage of the Six Paths, she is most definately NOT.
Her only significant use would be as a broodmare for Sasuke, mixing the Uzumaki (body/first son) and Uchiha (eyes/second son) bloodlines. And even then it's failure of theory, her insanity would win through and with Sasuke on the wrong side of sane their kids would eventually either do themselves in, kill each other, be locked away for rape/murder or be put down by the village like a dog with rabies.