Game Of Thrones Season 6: 12 Big Things We Still Haven't Seen
7. The Westerosi Play
This one may not be the most important element we haven't seen, but it's certainly going to be an interesting one, and one of the few plotlines we know comes from the pages of The Winds of Winter.
In the pre-released Arya chapter, she works with a man named Izembaro, a mummer, associate of the Faceless Men, and owner of a playhouse. It's there he'll put on a Westerosi play, with actors playing the likes of Cersei Lannister and Ned Stark. Like I say, not necessarily crucial to the plot, but it's something that should be a lot of fun, and a much lighter moment for Game of Thrones (although of course the play does also include murder and rape, because Game of Thrones).
It'll also tie into Arya's story, and her training outside the House of Black and White, so should actually serve a purpose to the narrative as well as being a fun, contained moment.