Another leak from 10 months ago especially talking about the last 3 episodes says the same about Jon and Dany (even if those leaks are confusing*). He got right the undeads are dealt with in the first 3 episodes and also that the undead dragon would leak fire. Can't say now those leaks are 100% accurate but could be.

Here is a link to his 3 posts: https://www.reddit.com/user/afraidpart/posts/

*The confusing part is mostly Arya being useless but it could be that she becomes useless in the next episodes because she killed the NK. And also at 1st he says Jon and Dany survives but then says Dany dies killed by Jon, like that other accurate leak.