Quick idea from me. Don't look at the technical aspect, because it was done very quickly.
http://www.youtube.com/watch?v=AK-3UNRm-yk
It's only an idea. I know you already replaced this moment with your Obi Wan Anakin theme, but I think that at the moment, when they say "may the force be with you", there should be a force theme presented. That would be a great continuity with OT.
Another idea I had in mind was about burned Anakin on Mustafar. Originaly, there was no dialog in this scene, so I tried to do something like this.
Original music:
http://www.youtube.com/watch?v=g98kvH83y5g
Force theme version:
http://www.youtube.com/watch?v=b0voGuaYEOM
But as I said, this was very quick made.