We've all forgotten that orochimaru;s plot isn't done, we've all forgotten the twisted scientist that orochimaru is. I 100% certain that Sarada is the daughter of Karin, it doesnt make sense for a pure bred uchiha to wear glasses (that's another topic). It doesn't make sense that sasuke's away from the life of his family knowing that he went through the same shit.
I really hope you guys aren't thinking im saying the orochimaru created sarada...cuz thats just stupidity. What im saying is that sarada is a mix of karin and sasuke, and theres a reason for that. Could possibly involve orochimaru, could explain why sasuke's away all the time, possibly researching, testing. Dont forget that orochimaru's still on search for a vessel, not saying it would be sasuke, but sarada's a possible victim/or a triumph card from sasuke, to truly achieving anarchy/over throw naruto(reach levels beyond naruto's current power)/ supreme overlord.
Theres a reason why kishimoto's focusing on sarada's life right now, theres a reason why sakura got angry when sarada got curious and fainted.
Why he would want to continue that?=Plots! Plots Plots Plots!