Game Of Thrones Season 7: 13 Biggest Rumours You Need To Know
8. Daenerys Vs Euron
Season 6 made it seem fairly clear that Euron and Daenerys were on a collision course. He may not be her major target (that's Cersei and the Iron Throne), but he will be a thorn in her side. Dany's aligned herself with Theon and Yara, and Euron is chasing them, so a fight was always likely.
Now thanks to some set leaks we know that, at the very least, Theon and Euron will come to blows. That fight takes place on a shoreline somewhere though, leaving it unclear just how it comes to that.