After months of trying to piece together increasingly desperate theories about the Game of Thrones finale based scouring the tales of Ser Duncan the Tall and Egg, the 90-second teaser clip that turned up Monday has finally given fans something more solid to fire up their imaginations.

Now, some fans are taking the absence of Bran Stark - the Three-Eyed Raven, supernaturally gifted, probably-integral-to-the-way-season-eight-plays out younger brother - is actually the Night King.

Basically, the theory centres on the statues that the Stark kids chanced upon in the crypt. Probably worth another look to refresh yourself.

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So: Jon walks into the crypt past some statues including dead Ned Stark. Jon, Arya and Sansa bump into each other and look at their own statues, which implies all the Stark kids are on their way off this mortal coil. But! Sansa and Arya's likenesses are young; Jon's statue looks older (and has a beard that makes him look like a cross between Kurt Russell and David Brent). So, two takeaways: Jon might live ...and where's Bran?

Some fans have leapt to the conclusion that Bran's lack of attendance at the graveside shindig is definitive proof that he's left his family's fight and gone to the dark side, and that the creeping cold we see in the teaser is Evil Bran finally turning up. That feather - maybe from a raven? - that turns to ice could be a little nod in that direction too, though some fans reckon it's a reference to Jon finding out his true noble lineage.

Either way, there's still three months to go until the 14 April, when the first episode lands, so there's plenty of time to mull things over.