Board Thread:News and Announcements/@comment-5014364-20170621204302/@comment-5014364-20170621205451

Okay, things we're fairly sure of combined with set reports:


 * Daenerys starts off by taking Dragonstone, probably with most of her land army in Dorne on the way North (you can't fit 100,000 Dothraki on Dragonstone island). This is the symbolic original seat of House Targaryen, ancestral holding, her birthplace, plus strategically it commands the mouth of Blackwater Bay into King's Landing.
 * With the Reach perhaps distracted by Euron to the west and arrayed to defend Oldtown, Jaime Lannister leads the surviving Lannister army in a daring and brilliant attack into the Reach against Highgarden...which they shouldn't need to be doing as the Tyrells would have been their allies if it weren't for Cersei.
 * Daenerys's Dothraki/Unsullied/Dragon army will march north and decimate the Lannister army, Jaime barely escaping.
 * The Unsullied advance west against Casterly Rock. Yes, the Dothraki cavalry aren't as useful in siege warfare against an impregnable super-castle.  The Unsullied are better at it.  Even so their attacks on the gates are just distractions easily repelled.  Tyrion uses his intimate knowledge of the castle to plan out how Grey Worm will infiltrate through the sewers and open the gates (the same plan they used at Meereen).  Casterly Rock falls, the Lannister field army defeated (what's left of it).
 * Euron, however, realizes that if Daenerys wins she'll make Yara ruler of the Iron Islands (well, in TV version). So he'll side with Cersei.  Makes sense as alliance of convenience - Cersei could never ally with the Starks of all people, and Daenerys wants the Iron Throne plus Tyrion wouldn't ally with her again.  Euron's really the only other faction that Cersei hasn't personally insulted.  Thus Euron leads the rest of the Ironborn fleets ("the" Iron Fleet is their national fleet, not the only one).  Leads a major night time assault against Yara's fleet...loosely parallel to the Battle of the Redwyne Straits shaping up in book six?
 * Theon will barely escape. Yara and Ellaria on her ship with Sand Snakes (for some reason) they get killed or captured.
 * Unknown if Euron gives Cersei command of the seas, or just enough to challenge Daenerys's complete control of it. Either way Daenerys isn't "trapped" on Dragonstone, her field army is visibly on the mainland.
 * Jon Snow will pardon surviving Northerners who served Boltons out of fear, revenge will achieve nothing, they need every man.
 * We hear of a big meeting at Dragonpit, each faction begging "okay, Daenerys hammered the Lannisters, but Cersei-Euron alliance managed to get some hits in with a sea battle. Daenerys has the upper hand, but we'd rather you join us to fight the White Walkers rather than fight a war of attrition using up men we could use to fight the zombie horde.

So no huge surprises in this trailer, but nicely rounding out the last one.

I hope that they address how Cersei is bankrupt at this point, but we do hear that Tycho Nestoris returns this season.