I've been thinking about giving a WTF moment to the PT, and considering some suggestions Bingowings has made of Anakin having a double personality ala Jekyll/Hyde... What if Anakin was, only in a way, a host for something? Implicitly suggesting of course, that the same prophecy the Jedi have, the Sith had it too. Rather easily established, this way you would be separating Anakin from suited Vader in a rather curious way, and making Vader stop being "an asshole in a suit".

"The end of the war is near, General. I sense Lord Vader is close"

"Have you ever heard of the tragedy of Darth Vader the wise?"

So we don't know who this Vader is, but we get the impression the guy is very important as a weapon, until the end when we see him in action.And it is a very good pretext for editing some non Vaderish dialogue in ANH just to leave "you're powers are weak old man. you should not have come back" (erase every reference of ObiWan and Vader knowing each other. Ben lies to Luke in Tatooine because he just can't tell a teenager "hey I fought against your father and left him to die in a lava river" if he wants Luke to join him). They know who Vader is by the Force