He left us two years ago Carrie Fisher, the unforgettable princess Leia of the Star Wars saga, and unfortunately died without having recorded any material belonging to episode IX of the franchise. In the face of this situation, it was decided by the family and directors of Lucasfilm that they would reuse material from episodes VII and VIII that were not used in the final versions. In this situation Todd Fisher, the actor's brother, has spoken to ABC News material in the question and how it fits within the development of the tape:
There are many minutes of material. And I mean not just discarded shots. There is content that has not been used before, new material that could fit into the story. That's what will surprise everyone. He wants to see how he was meant to see. As if it had been registered yesterday.
With respect to content of said material or on some type of detail of the plot of these shoots, Todd Fisher has revealed absolutely nothing, continues with the secret that surrounds the production of the ninth film in the series:
We are not allowed to say anything about anything. But we are very happy with what has been done.
Star Wars: Episode IX still doesn't have an official title and probably won't have it Star Wars Celebration April next year, where it is rumored that the first teaser trailer of the movie will also be shown.