1) Gareth Edwards on full display
Think about the quick scene of the ground level shot looking up at AT-ATs. It’s grounded and it’s muddy. Edwards also loves to use dark interiors with light pouring in and obscuring the outside (the opening part with Jones’ character walking through the hangar bay). He almost sees the darkness exposing the light. As if the dark underbelly of this fledgling Rebellion can expose the ruling Empire. And if we get anything as visually appealing in this movie as the Halo Jump scene from Godzilla, fans are going to be in fits of joy.
2) Gonk droids!
Those lumbering, seemingly useless droids are back again after making a short appearance on Jakku in The Force Awakens!
3) Ben Mendelsohn as Tarkin
This may be the best thing ever. Even though they tease Darth Vader (most likely voiced by James Earl Jones) and it is rumored he is in the movie, Tarkin is going to have a monster-like, menacing villain quality to him worthy of a Peter Cushing performance.
4) Purge Troopers
A tie-in to existing new material from the Star Wars: Uprising game, they are the black-clad troopers with the crazy helmets. According to the new canon, these troopers are like the old Dark Troopers from the EU LucasArts video games. They are elite troops that are utilized by Governors and Moffs. Expect these troopers to be taking direct orders from Tarkin.
5) Donnie Yen, you guys.
6) Alan Tudyk is a CGI Robot???
7) Felicity Jones is Jyn Erso
Also, it has not been well-explored within the canon Star Wars Universe how non-Jedi and defecting Imperials operated within the Rebel Alliance. We have gotten some of that on Star Wars Rebels, but no real movie treatment. Granted, Wedge Antilles, Biggs Darklighter, Tycho Celchu, all the major players that were a part of Rogue Squadron, used to be Imperials, but we don’t know much about how they got to where they were. It looks like from this movie we are getting a treatment of how the Rebels utilized the darker, seedier elements of their rebellion to make a major play against the Empire. So cool!