Having a random thought right now.

Darth Maul, Count Dooku and then Grevious.

In my opinion GL had no direction in which bad guy to have. No continuity between films doesn't let us look forward to what the bad guy does next.

Would of been nice to have Anakin and Maul showdown in which Anakin falls to the dark side in the fight; when Maul kills Padme after she has had the twins, and was coming to see Anakin to tell him. He never finds out about the twins. Obi Wan trys to talk him into seeing sense and then a fight ensues.

My other random thought was Maybe the siths secret power was if you kill a Sith lord you become a Sith lord. No one knows it but the Sith lords.

That way when Anakin kills Maul (who replaces Dooku and Grevious) he turns to the dark side. Also a nice way to get rid of the Sith Lords in ROTJ as Darth Vader kills the emperor and vice versa nullifying the power of turning Sith Lord killers into Sith Lords themselves as he was one already.

As previously mentioned on these forums Luke was pummeling Vader his eyes should flash to Sith eyes then Fade when he throws his sabre down.

This would fit in nicely with the continuity.

That way Anakin was the one the prophecy fortold when he gets rid of all Sith Lords including himself. The ultimate sacrifice.