With production still under way on Game of Thrones Season 7, fans are waiting for the first full trailer from this highly-anticipated season. During last night's episode of Westworld, HBO aired a new preview that showcased their 2017 lineup, including the first glimpse at new Game of Thrones episodes. The video has our first look at Jon Snow (Kit Harington), Sansa Stark (Sophie Turner) and Arya Stark (Maisie Williams), who may be reuniting this season, if their costumes are any indication.

While the video hasn't been officially released online yet by HBO, Watchers on the Wall assembled screenshots of this footage from fans, with a Twitter user dubbed "sansaerysnow" captured the Game of Thrones portion of the video from her TV set. While these three brief shots don't show much, it seems that all three of these characters are in the North, judging by their attire and the snowy backdrop, which could mean that Jon Snow, Sansa Stark and Arya Stark could share the screen together for the first time since the first season. Nothing has been confirmed at this time, but hopefully this brief teaser could mean that a full trailer is coming soon.

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Arya Stark hasn't been in her homeland of Winterfell since the end of Season 1, when the nefarious King Joffrey (Jack Gleeson) beheaded her father Ned Stark (Sean Bean). Over the past few seasons, Arya made Braavos her home across the Narrow Sea, where she was training to become one of the Faceless Men with Jaquen H'gar (Tom Wlaschiha). At the end of Season 6, she left Braavos to return home to Westeros, and in the Season 6 finale, she crossed off another name on her now-infamous list, killing the nefarious Walder Frey (David Bradley). Many had hoped that Season 7 will finally unite all of the surviving Stark children, and, judging by the attire Arya is wearing, she may have actually returned to Winterfell in this brief preview, but that has not been confirmed.

Both Jon Snow and Sansa Stark were reunited last season, as they helped take back Winterfell from the Bolton clan. At the end of Season 6, Jon Snow was named King of the North, despite the fact that he is seen by everyone as the bastard son of Ned Stark. However, fans learned the truth in the season finale, that Jon Snow is actually a Stark, except that he is actually the son of Ned Stark's sister, Lyanna Stark, and Rhaegar Targaryen, a blood line which actually gives him perhaps the best claim to the Iron Throne of anyone, especially the one who currently sits on it, Cersei Lannister. We learned about Jon Snow's heritage through the greensight visions of the last surviving Stark child, Bran, who was dropped off at The Wall by the long-missing Benjen Stark (Joseph Mawle) at the end of Season 6.

It is believed that Bran Stark will find Jon Snow in Season 7, and tell him about his true heritage. We also learned in the Season 6 finale that The Wall has been enchanted with a spell that keeps all of the undead creatures from crossing into Westeros, and there have been rumors that Bran may inadvertently break this spell at some point in Game of Thrones Season 7. While we wait for more details, take a look at the brief footage and screenshots featuring Jon Snow, Sansa Stark and Arya Stark from Game of Thrones Season 7.