Well, I suppose it COULD be done by using stuntment with flashy choreography and with digital technology these days you can transpsoe their faces onto the stuntmen.
I can see Vader jump/gliding a bit, but the idea of him doing a lot of flashy flips seems really otulandish, same for the old obiwan.
I liked the orignal Ruup Rup! song at the end of ep 6, and Anakin should have aged, Hayden Christiansen was a wierd choice, but oh well!
There will likely be more star wars movies someday, either set way after or way before the original series.
We are the music makers, and WE are the dreamers of the dream. -Willie Wonka