It seems Dany's force is not nearly strong as she thinks it is. Her army could not survive in the North, especially now that winter has come. Also I see her struggling to take King's Landing due to holding back (not wanting to roast civilians) and Euron may do serious damage to her fleet.

Even though I don't like this, I'm predicting a Jon/Sansa split. Jon and Dany may get married by s7 finale and LF may convince Sansa to play on his team.