Game of Thrones hasn't had a good hooded figure mystery since Uncle Benjen swooped in to rescue Bran Stark from wights north of the Wall, so now is as good a time as any.

In the teaser for Sunday's new episode — the as-yet-untitled penultimate episode of the series — things are so obscure that we've had no choice but to speculate about what we're actually seeing here. Does Euron Greyjoy (Pilou Asbæk)'s surprised expression at what he's seeing in the sky mean we're about to meet some new dragons, or are his pirate socks just that rocked off by Drogon learning to attack from an angle his megascorpions can't reach? Is Daenerys Targaryen (Emilia Clarke) pregnant in that shot from Dragonstone, or is it just an odd angle? Does Tyrion (Peter Dinklage)'s worrisome expression confirm that all that Mad Queen business is definitely about to happen?

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Another piece of that teaser that has some fans in a tizzy right now is the one of a cloaked figure lurking behind the Golden Company forces in King's Landing. He (or she) only appears in frame for a split second, but what we see is that the person is walking away from the mercenary march, which means they either snuck through behind them or got welcomed through the gates.

The most obvious assumption is that this is Jaime Lannister (Nikolaj Coster-Waldau), since he arrived to the north wearing a very similar dark cloak in the season's premiere episode, "Winterfell," and has since departed for the south. However, there are some other characters who were last seen wearing similar garb and might have business to attend to in King's Landing now as well, so we can't discount any possibilities just yet.

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Besides, last we checked, Hand of the Queen Qyburn hired Bronn (Jerome Flynn) to kill both of Cersei (Lena Headey)'s brothers on her behalf, and when the sellsword showed up to Winterfell to surprise them with a loaded crossbow, he didn't seem eager to tell the queen he was bargaining with them to secure Highgarden instead. So, if Jaime were to return to King's Landing, he might not get a very warm reception from his sister-slash-lover at all.

From what little we see of the hooded figure, too, his (or her) footwork seems to be a bit clumsy, which might point more to someone like The Hound, aka Ser Sandor Clegane (Rory McCann), than the Kingslayer.

Internet speculators have come through with some additional theories, including the idea that it could be the long-missing Daario Naharis (Michiel Huisman), who might have been captured by the Golden Company as a means of giving Cersei another of Daenerys' favorite people to slaughter. Others suspect it might even be the Faceless Man, Jaqen H'ghar (Tom Wlaschiha) coming to help finish off Arya Stark (Maisie Williams)'s list after A Girl saved so many lives in her defeat of the Night King.

It could even be Euron Greyjoy, returning from sea with an injury that would explain the wonky gait.

Chances are, it's just Jaime Lannister, but that couldrequire some more of that funky time travel action that's become such a staple of the series since Season 7; Jaime left after Jon Snow (Kit Harington) and the rest of the troops.

We'll find out soon enough when Game of Thrones returns on Sunday at 9/8c on HBO.

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<p>Emilia Clarke and Peter Dinklage, <em>Game of Thrones</em> </p>

Emilia Clarke and Peter Dinklage, Game of Thrones