DominicCobb said:

One interesting aspect of this edit will be that there will be no "I am your father twist." The real twist will come when the Emperor tells Vader that Luke is actually Vader's son. By focusing on Vader alone, the audience assumes that Padme dies before she gives birth.

Now that's an interesting prospect. Now to make Anakin a character we care about for that twist to have emotional impact! ;-)

I just realized how much more of an emotional impact "I am your father" is to a character we knew for two movies than that revelation would be to a character we've known for 5 movies by Lucas' reckoning.