Game Of Thrones Season 7 - 8 Clues From "Queen's Justice" Trailer

2. Jaime Takes Highgarden

The briefest glimpse of Jaime's broad back confirms that he's not defending Casterly Rock (which is great news for the Unsullied, since he wouldn't let it fall), but has instead gone to Highgarden. And even though there's very little in this shot, it's definitely a post-battle moment, as his soldiers can be seen sitting around recuperating - this is not the behaviour of invaders mid-battle.

In other words, Highgarden falls, and Jaime lives through it (not that that was much of a question really). The Comic Con trailer gives some indication of how he manages that victory - a bloody massive army.

Even though the main focus of the action in the trailer was staged around Casterly Rock, it seems likely that the bigger battle will play out at Highgarden, since the Tyrell army is famed for its size, just as the Lannister one is. Quite who will actually be leading that army remains to be seen though.