Serving as an immediate prelude to the very first Star Wars film (A New Hope), Rogue One restores a measure of gravitas to the Star Wars canon that was seriously undermined by the goofiness of 2015's The Force Awakens. Rogue One is still a remarkable nostalgia trip, thanks to the digital recreation of familiar Rebel and Imperial hardware along with the likenesses of actors who first appeared in the original 1977 film. But without the need to consider future franchise opportunities for its stars, Rogue One is free to kill off all of its major characters, marking a narrative structure that is…