I’d love to see something like the individual Doctor books for the Doctor Who rpg. Each book covers one Doctor, gives a brief overview of the era and the themes the show covered, and stats up the Doctor and companions.
Then there’s the meat of the book - a synopsis of each story, stats for important supporting characters and villains along with advice on how to use and play them as NPCs, advice on how to run that story as an adventure, and finally several short plot hooks and ideas to follow up on the story or put a different twist on it.
A book like that covering a single season of TOS, TNG, DS9 or Voyager would be amazing.