I imagine we'll see Summer again as a wight.
Given how fast things are moving and Jon telling Edd to make sure he keeps the Wall standing, the season may end with the sounding of the Horn of Winter.
late to the party but amazing ep, what everyone else is saying. one of the biggest episodes of the entire series for ten million reasons
mainly being....
The implications of changing the past, which as I understand it has been fan spec for years, go wide. Mad King, Bran the Builder, etc. Bran being able to...not change the past since it's already been changed, but to have a relationship with the past can mean a LOT of stuff going forward, especially in the context of all the other Greenseers and what they may have "changed" as well. Wide reaching implications through the whole show up to this point as well as going forward. Bran may very well wind up becoming a nearly divine being and influencing a huge percentage of the overall direction of the story from a very early day in the history of the show. The Three Eyed Raven (we're pretty sure) isn't crazy ancient but he said he's been waiting a thousand years...which implies he's existed through the tree network and saw 1,000 years of history. The possibilities here aren't just endless but are capable of reorienting our entire perception of significant events through the whole show.
Interesting also that the Three Eyed Raven "made sure" bran could fuck Hodor up almost as a way to illustrate "be carful" in a way that's etched in blood.
Other thing to mention, if Bran's "mark" means the white walkers could penetrate the Children of the Forest's magic barrier there.... Bran better stay away from the wall. Especially after Jon's foreboding final words when leaving. Of course I'm incredibly curious how they'll survive on their own in the middle of nowhere...
OTHER-other thing to mention and this is kind of critical to the overall thematic scheme of the show... pretty compelling that since the Children of the Forest is basically GoT's stand in for Native Americans being whipped out by white faced invaders (although Columbus and them would have a more olive skin tone due to being Spaniards...), it's interesting instead of having a "white savior" Martin subverted expectations by having them basically create a WMD (weapon of mass destruction) to combat probably the Andal's and obviously things got out of hand. Sort of a pretty compelling riff on the cold war nuclear holocaust scenario where the CotF invented a superweapon that might inadvertently wipe everyone out. It might be the show's most "modern" allegory instead of Rome/War of the Roses, etc.
Even if the reveal was presented to us rather nonchalantly it has deep-rooted thematic/narrative implications that I think are profound and compelling and enriches the overall fabric of the entire series retroactively. Smart, smart stuff.
This season is rocking. If the season maintains quality or continues to grow (since every episode, more or less, has been better than the last) it'll be one of the best seasons period.