TheoOdo said:
I have to disagree, rcb, I feel wookies would fit right in. Perhaps a subtitled Admiral Ackbar or newly voiced Ackbar could be used to explain that the planet the Death Star II is orbiting is in fact Kashyyk and not Endor.

The enslavement of the wookies can be explained visually, if as the imperial cruiser in which Han, Luke, Leia and Chewie are riding arrives it flies over a clearing in the woods in which wookie slaves are toiling in a quarry, surrounded by stormtroopers. Chewbacca looks out on them on growls mournfully.

Everything else can be explained via subtitles (Chewbacca, on principal, would not be subtitled) and using the occasional grab from the radio series to fill in gaps of dialogue from 3P0 and Luke. A simple *growl* subtitled as something along the lines of "You should not have come back, exile" or something to that effect could be used to explain Chewbacca's relationship with this particular group of wookies. Luke pleads with the wookies claiming he is a Jedi and that if they do not free him he will use his powers (snippets taken from the radio series could be used here) and 3P0 protests, ultimately does as he is told and says this to the wookies. They don't believe him ("the Jedi are extinct, we cannot hope for help from them now"), but Luke's display convinces them and in a short subtitled conversation between Chewie and the chieftain he explains that with the Jedi there is now hope to free themselves from the imperials.

Now I'm rambling with ideas, but I'm basically trying to reiterate the point I've already made. It's possible.

well, i can see how that could work. but it would go against the ROTJ novel. it describes ewoks. and after growing up seeing ewoks in the movie, it might look a little off. i guess you personally could redo those clips only with wookies and we can see what it looks like.