With Game of Thrones' L+R=J theory being confirmed in season 6, fans have been wondering what other plot points they've already guessed, and whether they'll be revealed in seasons 7 and 8.

A key one of those is the 'prince that was promised' theory. Here's a very brief synopsis of it from A Wiki of Ice and Fire:

'The prince that was promised is a prophesied leader or savior. The prince may be part of an ancient prophecy which foretells the coming of a hero to deliver the world from darkness. A "bleeding star" is supposed to herald the coming of the prince.[1] The prince is said to have "a song", the song of ice and fire.'

Kit Harington was obviously not going to simply say yes or no as to the veracity of this theory, but, asked about it by The Huffington Post this week, he did indicate that we might get answers this season and make a sage point about it not necessarily mattering:

"I think you have to wait and see what happens this year, and if we find out anything more about Jon. I think Jon would hate the term ‘The Prince That Was Promised.’ If someone turned to him and said, ‘You’re The Prince That Was Promised,’ he just wouldn’t pay much attention. That’s what I love about him, so I don’t really care about it either. You know, I think that’s what’s great about him. He’s got very little ego on him."

The House Sigils in Game of Thrones Show all 36 1 /36 The House Sigils in Game of Thrones The House Sigils in Game of Thrones House Bolton A red flayed man, hanging upside-down on a white X-shaped cross, on a black background. The House Sigils in Game of Thrones House Stark of Winterfell A grey direwolf on a white plain. The House Sigils in Game of Thrones House Blackfyre A black three-headed dragon on a red field, reversing the colors the Targaryen heraldry, as is the custom for bastard children. The House Sigils in Game of Thrones House Targaryen A red three-headed dragon on a black field. The House Sigils in Game of Thrones House Whent Nine black bats on a gold field. The House Sigils in Game of Thrones House Umber Four gold chains linked by a central ring on red. The House Sigils in Game of Thrones House Swyft A blue rooster on a yellow field. The House Sigils in Game of Thrones House Reyne A red lion with a forked tail on a silver field. The House Sigils in Game of Thrones House Redwyne A burgundy grape cluster on white. The House Sigils in Game of Thrones House Marbrand A burning tree on smoke grey. The House Sigils in Game of Thrones House Mallister A silver eagle on a blue field. The House Sigils in Game of Thrones House Whitehill A white pile inverted on indigo, with a single four-pointed star above. The House Sigils in Game of Thrones House Lefford A golden pile on blue, a sun right in the sky. The House Sigils in Game of Thrones House Karstark A white sunburst on black. The House Sigils in Game of Thrones House Tyrell of Highgarden A golden rose on a green field The House Sigils in Game of Thrones House Tully A silver trout on a red and blue background. The House Sigils in Game of Thrones House Tarth Yellow suns on rose quartered with white crescents on azure. The House Sigils in Game of Thrones House Tarly A red huntsman on green The House Sigils in Game of Thrones House Selmy Three stalks of yellow wheat on a brown field. The House Sigils in Game of Thrones House Royce A shower of pebbles on an orange field, surrounded by runes. The House Sigils in Game of Thrones House Mormont A black bear in a green wood on a white field. The House Sigils in Game of Thrones House Martell of Sunspear A red sun pierced by a gold spear, on an orange field. The House Sigils in Game of Thrones House Lannister of Casterly Rock A golden lion on a red field The House Sigils in Game of Thrones House Greyjoy A golden kraken on a black field The House Sigils in Game of Thrones House Frey The Twins and the bridge, on a grey field, surmounting an escutcheon of blue water. The House Sigils in Game of Thrones House Forrester A white ironwood tree on a black field embellished with a black sword. The House Sigils in Game of Thrones House Baratheon of Dragonstone The crowned black stag of Baratheon enclosed within the fiery red heart of the Lord of Light. The House Sigils in Game of Thrones House Arryn A white falcon and crescent moon on a blue field. The House Sigils in Game of Thrones House Dayne of Starfall A sword and falling star on a lavender field. The House Sigils in Game of Thrones House Dondarrion A forked purple lightning bolt on a black starry sky. The House Sigils in Game of Thrones House Crakehall A black and white brindled boar on brown. The House Sigils in Game of Thrones House Clegane Three black dogs on a yellow field. The House Sigils in Game of Thrones House Bracken A red stallion on a gold field. The House Sigils in Game of Thrones House Blackwood A flock of black ravens surmounting a dead white weirwood tree. The House Sigils in Game of Thrones House Baratheon of Storm's End A crowned black stag rampant on a gold field. It only gained the crown after Robert usurped the Iron Throne. The House Sigils in Game of Thrones House Baelish A black mockingbird on a yellow field; Petyr Baelish's self-fashioned sigil.