Ooh, interesting idea! And I happen to own it.
I could remove all the ROTS audio and replace entirely with that audio, so the music wouldn’t be a problem, and the sword noises might sound funny in a lightsaber fight. The only issue I see is the dialogue, which works great, but there’s nowhere to put it - i.e. there’s no dialogue in the SW fight so no lip sync to use.
Maybe at this point they can both just be thinking at each other?