If they leave a clifferhanger-type ending, you can bet the epic thrones movie will be on the horizon although I'm sure that would've leaked by now.

I do wonder if Jon can die by dragon fire. I know he got burnt early on when he burned up the white walker that someone got into Mormont's chambers but he healed pretty quick from it. I guess the dragon could still eat him like Farquot at the end of Shrek. Dany is close to invincible if she keeps next to the dragon