if GRRM sticks to the three spoilers he gave the showrunners (Stannis burns Shireen-Hodor time fuckery-Bran as Kot7K) it makes absolutely no sense for Sansa to be QitN.

aside from that, so far there is no indication that Sansa will ever hold that title (she is most connected to the South than to the North) or even that the title itself exists. we are specifically told crypts is where they bury the KitN and the Lords of Winterfell. and while there are other figures that weren't Kings or Lords there is no mention of ever being a Queen or a Lady ruling. bare in mind that the North has had a long tradition of Starks ruling, making the scenario of a woman not being in power almost impossible.