"Game of Thrones" season 7 has begun filming, but as usual, not much is known about storylines or new characters (aside from the casting of Jim Broadbent in a "significant" role). But now comes the first spoiler of the season, from Watchers on the Wall, and it spells trouble for the Greyjoys.

The site says that filming this week centered on a major sea battle between Yara Greyjoy (Gemma Whelan) and her murderous uncle, Euron (Pilou Asbæk). Furthermore, "It appears that their uncle Euron is catching up to the siblings and will capture one of them."

If it's Theon (Alfie Allen) ... oofa. Poor guy has already gone through one terrible captivity at the hands of Ramsay Bolton (currently sitting in hell).

Euron seems to be gaining quite the upper hand. Watchers on the Wall has also heard he teams up with Cersei (Lena Headey), which makes sense, as she needs naval power to fight Greyjoy fleet under the command of Daenerys (Emilia Clarke). And Euron initially wanted to marry Daenerys, but hey, if he can't get one queen, he'll take another.

"Game of Thrones" season 7 is expected to premiere on HBO in summer 2017.

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