About the Obi-wan and Anakin fight at the end, I think it would be interesting to leave a more ambiguous ending as to what might have happened to anakin. However, I think it's also important to explore the more brutal and graphical nature of his transformation.

The best way to see what would work best, would be to make a few mock-ups exploring several possible outcomes, and let us take a vote on it.

I am totally open minded. I would like to see a robocop type of brutal injury to anakin but I'd also welcome a more open ended approach or maybe something totally different, I don't know. Whatever works best. :-)