I'm referring to the White Walkers and the Night King, two frightening realities that Jon struggled to explain to a clearly skeptical Dany. It's a tough task: how do you convince someone to fight (and commit considerable resources to) an enemy they cannot see with their own eyes? (Cough, climate change, cough.) Though he insists he's not her enemy, Jon's refusal to bend the knee still makes him a threat. And Dany is correct to wonder why -- if the White Walkers truly are so dangerous and the apocalypse is near -- would Jon risk his life by not submitting to her will? Who cares? Why not just bend the knee and get it over with?
It's here that Jon's resurrection, which Davos alluded to but didn't quite spill the beans about, might come into play later. Dany, who controls three massive dragons and believes herself to be a once-in-a-lifetime revolutionary figure, is a leader who puts a certain amount of faith in prophecy. Jon's death and return lend him some mystical gravitas that Dany might find appealing -- and it's where he probably draws some of his gumption from. Once Dany finds out the truth about Jon's past and they can bond over their magic abilities, I bet their partnership becomes a little less testy.