About the rest of the crawl: I'll be going back to the drawing board to try to fit the new one as closely within the official crawls' line-by-line constraints as I can.
Regarding how the Separatists would stay together after Dooku's death, a key victory such as that wouldn't mean that the war would end immediately; there would likely be pockets of resistance that would still need to be defeated. So, the fighting in the rest of the movie would essentially be clean-up operations to make the defeat absolute. That's been a difficult concept to fit into the crawl and still have it sound cool. Originally I had "Capture will begin the end of the conflict"; not very literary-sounding.
The music: I'll definitely be listening to GM's Episode 3 music before I decide on including non-JW tracks (but I really do like some of the moody pieces from GLADIATOR).
Regarding "revenge" and the episode title: though the concept of the Sith's revenge was set-up very blatantly in Episode I, it became a very weak plot point that never sufficiently (IMO) played out in any of the prequels. OLK, your points about the sources of the desire for revenge are very plausible, but they are never really driven home in the movies. The reason for revenge should have been apparent since, in a movie, strong plot points don't exist if they aren't shown on-screen (the old drama addage: "If it ain't on the page, it ain't on the stage.").
Some other titles for consideration: "The Republic Falls", "The Twin Fates", "The Dark Times", "The Republic Besieged". I just came up with "Besieged", and I like it a lot; topical and doesn't give too much away just like "A New Hope"! Any of these hit a good nerve, or do you guys have any titles to suggest?