If Sarada is Karin's daughter, then that means she is a child of Uchiha and Uzimaki blood, therefore capable of attaining the Rinnegan.. Hence why Shin would be after her? 
Uzimaki's are decendants of Senju'sisn't it Senju and Uchiha DNA you need for Rinnegan
Being a descendant doesn't mean you have their DNA fully though right? From what I've heard it has to be Senju and Uchiha. No shortcuts unless you're like Nagato loolUzimaki's are decendants of Senju's
Yeah but Naruto and Sasuke were descendants of the SO6P, so surely their must be something special about Sarada?Being a descendant doesn't mean you have their DNA fully though right? From what I've heard it has to be Senju and Uchiha. No shortcuts unless you're like Nagato lool
Exactly, and thats the only way how you unlock RinneganRinnegan comes from Hagoromo chakra or combining Ashura+Indra chakra.
You can't get it just by combining random Senju and Uchiha DNA. Otherwise Danzo and Obito would have gotten their own Rinnegan.
indra-and-ashura's....isn't it Senju and Uchiha DNA you need for Rinnegan