And wasn’t there a new Star Wars movie, which will fill in the back story of Han Solo? I haven’t kept up with it. But, there could be many more such movies made, if they delve into the back story of multiple characters.
Interesting how this all works. I had heard that many many years ago, that George Lucas and his people had to brainstorm back stories which explain things. When Star Wars became such a huge hit, and inevitably talk of sequels came up, that’s when George devised plot points, such as Darth Vader being Luke’s father, and Luke and Leia having been twins separated at birth.
None of that was talked about in the first movie, because Lucas didn’t know that there would be a sequel at the time the first one was made.