4. Any Story Focusing On Chewbacca
You have to feel for the guy. Not only was he denied a medal at the end of A New Hope, but we have no idea if what he is saying is actually being translated properly by Han. There is an interesting fan theory that he was a sleeper agent who worked for Yoda. Yoda foresaw Luke and Leia's birth, and put Chewbacca in a position to be at the right place at the right time in order to help them, using the skills he demonstrated in the Clone Wars. While entertaining, it would be hard to make a blockbuster feature film out of a character who speaks in growls and snarls. Plus, a lot of the viewing audience hates reading subtitles. Chewie's backstory would be better told via another route that we'll look at shortly.
3. Shadows Of The Empire
If you haven't read the book or played the video game, this off-screen chapter of the Star Wars universe focuses on the people and events that allowed the Rebel Alliance to steal the plans for the newly built Death Star in Return of the Jedi. It's entertaining, with good characters, and a great villain. There is one major problem, and that is that the characters that would be needed to retell this story are too old. There isn't a CGI program running that could transform the famous heroes from Episodes IV - VI back to their former glory. There is no way the story could be told without them, and there is no way it could be successfully done with them. It's a terrible Catch-22.