It's already been a good week for Game of Thrones fans, with the debut of new Game of Thrones Season 7 photos, which featured a new glimpse at one of Daenerys Targaryen's (Emilia Clarke) massive dragons, and a chilling new motion poster featuring the one enemy all of Westeros should fear, the Night's King. At long last, today finally brings a new trailer with exciting footage that shows the Great War is finally upon us. Be warned, if you aren't caught up with Game of Thrones quite yet, there will be some SPOILERS below, so read on at your own risk.

The trailer, which debuted on HBO YouTube, begins with Cersei Lannister (Lena Headey) stating that they have enemies from all directions on the map, pledging to her brother Jamie Lannister (Nikolaj Coster-Waldau) that they will defeat all of them. She also mentions that they are the last Lannisters left, which isn't entirely true, since Tyrion Lannister (Peter Dinklage) is certainly still alive and well, although he will be helping Daenerys Targaryen take the Iron Throne, instead of helping his siblings keep it.

This new footage also shows Daenerys and her army, lead by the Unsullied warrior Grey Worm (Jacob Anderson), arrive at the massive gates of Dragonstone, rumored to be Daenerys' home base as she starts her quest for the Iron Throne. We also get a brief glimpse at Daenerys' Dragonstone throne room, which we had previously seen in some leaked set photos that surfaced last year. Perhaps one of the most intriguing scenes in the trailer, though, features Sansa Stark (Sophie Turner), listening to Petyr "Littlefinger" Baelish (Aidan Gillen) tell her that, while her father and brothers are gone, she's the only one left, a scene which comes just after Jon Snow (Kit Harington) is hailed as the King of the North. Littlefinger also tells her that she's the "last, best hope against the coming storm."

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Given Littlefinger's penchant for deception and manipulation, and given how the shots of Jon Snow and Sansa Stark were juxtaposed in the trailer, this could hint that Littlefinger could be trying to manipulate Sansa into overthrowing Jon Snow. While we learned at the end of the Season 6 finale that Jon Snow is actually not the bastard of Ned Stark (Sean Bean), but actually the son of his sister Lyanna Stark and Rhaegar Targaryen, none of the other characters know this yet, except for Bran Stark (Isaac Hempstead Wright), who saw the truth in a "greensight" vision of his. We last saw Bran and Meera (Ellie Kendrick) being lead to The Wall by Benjen Stark (Joseph Mawle), who has been missing since the first season.

Many fans have been hoping for a Stark family reunion this season, since Bran has made his way to The Wall and Arya Stark (Maisie Williams) has also returned to Westeros, after spending the past two seasons in Braavos. Arya returned to kill one of the many on her kill list, Walder Frey (David Bradley) in the Season 6 finale, but in this new footage, we see Arya by herself, trying to make a fire in the snowy woods. We also get a cryptic statement from Davos Seaworth (Liam Cunningham), who says that everyone needs to band together, presumably to fight the White Walkers, or everyone will die, and then "it won't matter whose skeleton sits on the Iron Throne." Take a look at this action-packed trailer for Game of Thrones Season 7, debuting Sunday, July 16 at 9 PM ET on HBO.