Game Of Thrones: 12 Easter Eggs You Probably Missed In Season 5
9. A Deadly Trend For Kings
Up to this point, certain things happened in almost every season of the show, such as Arya kept saying "valar morghulis" as her final lines (she didn't in Season 5, since she was distracted somewhat by her new blindness) and Margaery getting married.
The same can be said of killing kings, which has happened in every season so far. In season 1 it was Robert Baratheon; season 2 saw Renly Baratheon's creepy murder; season 3 was Robb Stark's final call; season 4 ended Joffrey Baratheon's reign and and season 5 saw at least Mance Rayder and possibly also Stannis Baratheon slain.
If you're Tommen, you should probably start to get worried about what season 6 has in store for you given that the cast is running low on actual kings now. Unless the theories about Stannis ducking are to be believed.