That’s a good question. The only scene that could possibly go there is Obi-wan and Padme, and that wouldn’t work for numerous reasons.
Intercutting the fight with him forming the Empire might be cool since both scenes cut away to events that are no longer shown, but again that may be weird.
I believe I may have found the solution. Well, I didn’t find the solution. I was browsing through FanEdit.org, and I found this edit called Revenge of the Sith: Reborn by TM2YC (whom I believe is Ryan McAvoy on here). I think he handles the scene really well.