Maybe replace 3PO’s retelling of the trilogy with him translating for the Ewok chief, who could be telling the story how the Ewok fled from Had Abbadon to Endor.
Obviously it would have to fit with the available footage of the Ewoks and I think you should add some more details to the story, otherwise it might feel too tacked on and fan-edit-y.Maybe Had Abbadon was the home to ancient Sith and the Jedi helped the Ewok relocate or sth, but I’ll let you figure the details to that story on your own 😉
That’s honestly a very good idea, the whole Ewoks lived on Had Abbadon were kicked out by the Empire! Obviously, it is a bit difficult, but the good thing about having C-3PO say the dialogue is that lips moving isn’t an issue. And it would more sense as to why Leia reacts like she’s listening to a story she’s never heard/lived in.