Ending II with Anakin turning is a pretty interesting idea. I always wished there was a sequence where we actually saw Anakin, as Darth Vader, killing Jedi. The closest we ever get to that is the security hologram.

A radical, random idea, but one could make Anakin/Vader go to Mustafar in III because Jedi are hiding there. It would require some green screen work and costumes, but you could have someone as Anakin with his hood up fighting actors dressed as Jedi. Just replace the Separatists leader massacre with Jedi instead.

I like your idea for an alternate episode III as well Smithers. I think we will be getting an Obi-Wan movie (I think we’ll hear about it before the end of the year), but if for some reason it never comes to fruition, I think it would be possible to rework some material from Ewan McGregor’s film Last Days in the Desert as well.