Consideration needs to be made for Sansa's prophecies. Bran - "He saw Sansa crying herself to sleep at night, and he saw Arya watching in silence and holding her secrets hard in her heart. There were shadows all around them. One shadow was as dark as ash, with the terrible face of a hound. Another was armoured like the sun, golden and beautiful. Over them both loomed a giant in armour made of stone, but when he opened his visor, there was nothing inside but darkness and thick black blood."
Some way or another, she will have more involvement with Sandor and Jaime and I am guessing it's Gregor Clegane looming over them all.
Ghost of High Heart - "And later I dreamt that maid again, slaying a savage giant in a castle built of snow." So whether you believe the giant is LF or Gregor, they are in there somewhere, and it seems to all be point to WF. \
Sansa is leaving the Vale with someone and heading to WF. GRRM setting up a tourney as either a distraction for the escape (or kidnapping) or it will serve to attract certain people as noted above.