1. Yes, there's a chance Jon's heritage will come out next week but not sure. If/when he rides a dragon I think it'll be hard for many people to argue about whether he really is a Targaryen. By the way, how has Jon not mentioned to Daenerys the fact that he spent time with the only other known Targaryen (Maester Aemon) at Castle Black!?
2. I'm not sure about this. She didn't go to King's Landing and burn down the Red Keep, that would have been a massive issue. Just because both Jaime and Tyrion were horrified by the people being burned, doesn't mean she is a tyrant for using dragons in battle, because otherwise there's no point in having them. Like I said above now though, I get the feeling Dany will go on a bit of a power trip after winning this battle.
3. A combination of Tyrion and maybe Jon Snow but Jorah Mormont is a good shout too. I'm looking forward to seeing what he has to say about Samwell Tarly if he gets back in time to meet Jon. The fact that Sam knows about the threat from the white walkers, and he is trusted by Jorah, and Jorah is trusted by Dany, I feel like this will play some sort of role.
4. Yeah, this one falls in the category of pretty cool for me. It had to happen but I don't like them going too far with fan service either.
5. Bran won't just turn into the three-eyed raven fully. There will be glimmers of Brandon Stark in there as well, and I expect him to out Littlefinger for the role he played in Ned's death, possibly in response to a threat to one of his sisters. I know that dagger was used to try and assassinate Bran, to set up Littlefinger's lie that led to Catelyn arresting Tyrion, but was it also the dagger used here?