Could that be true
No way.
Jon is very conservative about interaction with the opposite sex: he never slept with whores unlike his fellow recruits, refused to have sex with Ygritte until he was forced to, etc. Is he the kind of person who'd marry a woman whom he considered for years to be his half sister, or cousin?! Out of the question. For the same reason I don't believe he'll marry Arya, nor Daenerys (who is his aunt).
Jon is very conservative about interaction with the opposite sex: he never slept with whores unlike his fellow recruits, refused to have sex with Ygritte until he was forced to, etc. Is he the kind of person who'd marry a woman whom he considered for years to be his half sister, or cousin?! Out of the question. For the same reason I don't believe he'll marry Arya, nor Daenerys (who is his aunt).
i agree if Sansa hooks up with anybody it should be Podrick (i ship them for some reason)
I just don't see John, Sansa, or Arya hooking up with a lifelong sibling; even if actually a cousin. Those Northerners are a conservative bunch.
Let's assume that Daenerys and her court will travel north: an alliance with the North makes perfect sense. Marriage alliance, or a simple treaty. Whatever happens between Jon and Daenerys, that journey puts Tyrion and Sansa back together - they are still married.
Before news of the Red Wedding hit King's Landing, Tyrion and Sansa looked like they were enjoying each other's company, as friends if not as man and wife. When it comes down to it, Tyrion has treated Sansa better than any other man in her life. They might well consumate their marriage. It would be a good strategic alliance. It creates a bond between Daenerys' court and the North.
That also opens the door to a new sub-plot. Petyr still wants Sansa, which means he wants Tyrion dead.