I'm still on the fence in regards to "The Hidden Fotress", it just seems to me too directly derivitive of Kurosawa, and as I mentioned before, it's refer to a specific tangible thing which while a major plot point, doesn't really embody the film. That's just my opinion though. As for "Dark Force Rising" over "Revenge of the Sith" well... I'll never be able to divorce Dark Force Rising from the thrawn novel. Nor do I think Revenge of the Sith is a bad title. The arguement that people don't know who or what the sith are holds true for the PT as it stands now, but from the endless discussions we've been having about your edits and plans, I'd say your final versions will go a long way towards eradicating that ignorance on the part of the audience, in which case, there really wouldn't be any need to change the title. Also, I never truly liked the title "Dark Force Rising" for the novel, Always sounded kind of hokey to me.

For me, my titling Scheme would flow thus:

I: Balance of the Force
II: The Clone War
III: Revenge of the Sith
IV: The Flame of Rebellion
V: The Empire Strikes Back
VI: Return of the Jedi

that's just me though, like I always say, these are your edits, you gotta do what feels right to you.