No joke, HBO's upcoming "Game of Thrones" spinoffs should be written by the fans who come up with these theories. They are just out-of-the-box brain-busters. Right on the line of brilliance and madness, which is perfect for this series.

You've probably read dozens of fan theories by now, and maybe even already know this one attempting to connect The Night King and Bran Stark (Isaac Hempstead Wright). It sounds mad at first, but there are actually decent arguments for how Bran could be The Night King himself. (There's no explanation for how he developed those javelin skills, though.)

Here's the theory, and some reactions in support and against:

It probably won't happen, not because it couldn't be explained -- so much on this show will never be explained, we're just meant to accept it -- but because there are only seven episodes left in total and there may not be time to drop this sort of bomb. But still. Maybe?

The GoT Season 7 finale airs this Sunday, Aug. 27 at 9 p.m. on HBO. We know Bran will have some kind of role, since he's featured in HBO's promo photos. We're also expecting him to help us out with more visuals on the episode's title couple.

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