To start off, I'd like to say I'm really excited by this project! Your work continues to greatly impress me!
This scene in particular has me jazzed. Fantastic concept! I agree with Bingo's suggestion of Palpy's prune face flashing in there...have you considered having his yellow eyes gleaming in the darkness? I believe in the theatrical cut this happens right after his first dons his hood...might look neat. Also, I believe someone suggested Palpatine cackling at a point during the fight...after cutting down the first three Jedi a gleeful cackle would be quite in character (plans to fruition!!)...I'm thinking specifically something like the one he used in ROTJ after Vader parries Lukes initial saber swing....