Twilight of the Apprentice Or: Inquisitors, Maul, & Vader, oh my!

Well, well, well...let me start by saying I'll readily admit that I'm one of "those people" who have regarded several of the episodes in Star Wars Rebels this season as "filler." Not that I thought they were bad, mind you, just not necessarily in keeping with the overall arch of the story, and sometimes seemingly out of place in the timeline (i.e. the inquisitors are hot on their tail, yet disappear for multiple episodes at a time)...but, anyway, the bookends to season two way more than makeup for any misgivings I might have about other episodes, and I think "Twilight of the Apprentice" has actually usurped "Siege of Lothal's" position as my favorite Rebels episode so far (though that might just be because it's so new and sooooo much happens, time will tell)...so, enough preamble, let's jump head first into this amazing episode, and, uh, obviously, spoilers ahead...

What Saga Secrets Will We Find in Rogue One?

Okay, I apologize ahead of time, but I'm going to be "that guy" and start off by ranting about a pet peeve I've developed lately:  fans (or anyone for that matter, really) referring to Rogue One by the ridiculous full title, Rogue One:  A Star Wars Story. The "A Star Wars Story" tag line is just there to let the general public know that this is a movie that takes place in the Star Wars universe, it's not meant to be said every. time. you reference. the film. Bah! Anyway, it'd be like saying "Captain America:  Civil War, A Marvel's Avengers Story"...see how dumb that sounds? If you're someone who does this, please, I beseech you, stop. Just call it Rogue One. Just Rogue One. That's all...alright, deep breath, and now that I got that out of the way, let's jump right into the thick of things and discuss what, if any, secrets or tidbits about the episodic Star Wars saga might be revealed in Rogue One...