just ignore astrocreep, that imdb link is quite interesting.
obviously Night King + White Walker + Benjen stark appearing, is quite interesting. well into book 6 in the north story, spoilers.
We have Kevan/pycelle/Varys scene seems like it's in.
Balon Motherfucking Greyjoy makes his first appearance since uh, what? season 3? maybe he'll finally die or maybe they'll skip that and have him direct the ironborn to invade the reach (expect most of that to occur off camera). "yara" is there too so maybe he does die and she just assumes the throne.
sandsnakes, bleh.
of course sometimes actors are credited in episodes that they don't appear in, so there is that, but it looks hopeful.
also from IMDB
episode 9titled dance of dragons, looks like the dany/drogon scene. Hell the name alone kinda tells you. but It has "pit announcer", dany & company, tyrion, jorah. and not that many other storylines happening that episode. some dorne, some braavos, some winterfell. that's it.
and it looks like yara greyjoy actually starts making appearances episode 6 and beyond. so looks like some sort of greyjoy story is going to occur. maybe she ends up in the winterfell story after all.