I only watched the 6 movies and 2D Clone Wars. What is this one about? Do I need to watch everything else?
This is about how the rebellion started
You do not need to watch any other Star Wars to understand it
In fact, it's so different in tone and style from the other movies, it doesn't even seem like it's Star Wars
It works perfectly fine as the story of a rebellion against an oppressive regime even if you don't know Star Wars