Finally, Samwell Tarly’s book-learning pays off! The seventh season premiere Game of Thrones brought with it a new revelation: True to what its name would suggest, Dragonstone was built over a huge deposit of dragonglass, an obsidian-like substance that’s the only material known to be able to kill a White Walker (aside from Valyrian steel). Trouble is, Daenerys Targaryen just gotten back into Dragonstone with her army, her fleet, and her dragons, meaning that the dragonglass underneath her ancestral home is no longer free for the taking — and if the teaser for next episode is any indication, the leaders of the North’s ruling families still definitely don’t trust the Targaryens enough to endorse an alliance. So will Jon Snow be forced to attack Dragonstone to get the dragonglass he needs to save Westeros from White Walkers?
If you ask me, launching an attack on Dragonstone would not be a smart decision for Jon Snow, nor would it make all that much sense considering his current priorities. From his conversation with Sansa during the season premiere, it’s clear that his primary goal is to raise enough of an army to defend Westeros from the dangers beyond The Wall. Expending troops on a mission so far south seems counterintuitive to that purpose — not to mention that it would put Northern soldiers straight into the path of the Lannister armies, who currently hold power in the Crownlands. Jon might not be overtly concerned with Cersei’s troops reaching them in the North, but they’d surely be outnumbered if they came so close to King’s Landing.
It’s more likely that Jon will ignore the warnings of his council (as one man said in the teaser trailer for next episode, “A Targaryen cannot be trusted!”) and attempt a straightforward meeting with Daenerys, in an effort to impress upon her the importance of defeating the Night King and his army of White Walkers. Given his prior friendship with Tyrion Lannister, who’s been to the Wall and now serves as the Dragon Queen’s most trusted adviser, he might be able to convince Daenerys that she should give up her dragonglass freely for a noble cause. Or, she could follow in the footsteps of the last lord to rule Dragonstone, Stannis Baratheon, and try to use Jon’s influence (or his army) as a tool to wage a war for control of the Seven Kingdoms.
That’s all ignoring the big elephant in the room, which is that Jon and Daenerys now officially have a relative in common — and neither of them know it yet. Since Bran’s reached The Wall, though, it’s only a matter of time before he reunites with the rest of the Starks at Winterfell and reveal’s Jon’s secret Targaryen heritage, which might complicate matters. Dany could welcome the son of her older brother Rhaegar, or she could feel threatened by his possible claim to the throne (it wouldn’t be the first time in Westerosi history that a Targaryen bastard attempted a rebellion) and deny him any help whatsoever. And what happens if the North finds out about Jon’s Targaryen father? The Mad King Aerys did kill Jon's uncle and grandfather, and no one knows enough about Daenerys to be able to claim she's any different.
Either way, it’s pretty clear that Jon and Daenerys will eventually meet in some capacity, and that he’ll come to her in Dragonstone rather than her traveling all the way up north. After all, (major spoiler alert!) Kit Harington and Emilia Clarke were seen together during the filming of Season, 7 in a location that looks not unlike the winding stone path from the shore and Dragonstone that appeared in last week’s episode.
Whether that inevitable meeting between Dany and Jon does end up happening in Episode 2 is anyone’s guess, but mark my words, these two will definitely come face to face before this season of Game of Thrones is over. Hopefully Jon will get some dragonglass out of it, too — I'd hate to think of what those White Walkers would do to his newly formed Northern army.