I have actually toyed with doing TPM entirely in narration, but there's a few things I don't like about that.
1. I like the lead-in of Vader intercepting Leia's ship above Tattooine leading to him thinking about Tattooine which leads us into the story well.
2. I don't want to lose Darth Maul/Qui-Gon. They are important to the story.
I'm going to start playing with some rotoscoping ideas. I don't know how that will turn out, I'm terrible with effects programs. But it's going to make the edit that much better.