[Hammock Parties]

I'm actually more interested in the poster than the teaser.

I'm trying to unpack the size imbalance between Luke and Kylo's faces, but it sure means something that Kylo looks rather sympathetic here. It's even hiding the scar, and his eye and brow are matching Luke's instead of looking angry or snarling. This comes down to how you read expressions, but to me Kylo looks more worried where Luke looks sad but more determined.

Reys Lightsaber color is changing to Red at the top. Maybe she falls to to the dark side or we finally get a proper introduction of force neutral users in the movies. They've been building those up since rebels and even mentioned them in Rogue One.

Luke's head being the larger, it may symbolize he is going end up as the next big threat. While Ben is sinking back and lower which may show he's falling back from the dark side which are both supported by the teaser. It will end with Rey will be the final light in the galaxy.