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Snoke spends most of the movie in his massive Wedge shaped Destroyer.
The people that attack Luke and Rey on Ach-To aren't Kylo and his people. They are Snoke's guards.
Kylo doesn't have his helmet anymore as punishment from Snoke. Snoke blames him for Starkiller Base and Rey escaping to Luke.
Kylo has a special TIE Fighter with a skinny Bomber style body and Interceptor Panels.
"The Jedi Must End" is part of Luke wanting to end everything and have no more Force users. Basically, he's kinda Gray, but mostly just wanting to stop a cycle from repeating itself. It gets used in the movie as his "TOO OLD TO BEGIN THE TRAINING" spiel.
The birds on Ach-To are called Porgs. Most of their scenes are with Chewie and Artoo. But, Luke uses them to show Rey how strong he is in the Force. Disney is already pimping them hard for Fall/Christmas merch.
The First Order in this movie are blitzkrieging. Everyone of them now exists on Snoke's moving platform. So, when his Wedge Ship shows up, it's about to drop 1000 ships on you.
The First Order Walkers vs. the Modded B-Wing fighters is the Battle of Crait. Specifically, it's an old Rebel Base from the OT era. Leia and her team are using it to get rich minerals to fence back to the Republic for quick cash. The Walkers are there to blow up the mining base and effectively bankrupt the Republic/Resistance.
That red dust shit that the B-Wings kick up is the valuable mineral dust.
Mystery Asian Lady (Rose) is a Resistance agent holdover whom feels forgotten on a back world while the Resistance marches forward. She teams up/takes care of Finn.
Benecio Del Toro is the leader of the Casino Planet. Early reports call him Evil Lando.
Frank Oz did 5 days of ADR on this. Take that for what you will.
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