I don't think Sandor joining Jon and Sansa is as far-fetched as folks might think. If you recall, the Hound had some measure of affinity for Sansa which even she noted (more so in the books but still). If they were to cross paths again, there is a decent chance he could be convinced via her to lend his sword to their cause. Sadly, the likelihood of Cleganebowl is outside the realm of reasonable possibility for now due to proximity (or lack thereof).

 

What I really want to see is Tormund and Brienne in a fight scene (as a duo). Nothing sparks attraction/love like battling through conflict...and I'm of the mindset that she could outfight him, which of course he'd love.

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