Replace all footage of Darth Vader with YouTube videos of cute adorable bunny rabbits.
Don’t replace the entire shot; just motion track the YouTube video over the top of the space Vader occupies in frame.
I foresee arguments arising about which moment exactly to start adding the adorable bunny rabbits when editing ROTS.
Seeing as Vader was only in that movie for 5 minutes, it only makes sense to add them in after we’ve seen Anakin get burned to a crisp and writhing in agony while the medical droids fix him up.
So, the logical conclusion is that we add the bunny rabbits the moment Anakin gets his helmet.
I contend that Anakin becomes Vader when he’s given the title by Palpatine, after cutting Mace Windu’s hand off and pledging himself to Palpatine’s teachings. So the bunny rabbits cut in mid-shot as Palpatine begins the word “Vader.”