It's pretty obvious from the footage in TPM that Palpatine is the bad guy. I was expecting a real twist like the chancellor being a clone or a droid who is replaced by his Sith twin with it being so obvious.

That would be rather cool actually.

Imagine if Mace went to confront Palpatine and found a malfunctioning robot Chancellor instead

and turned to face Sidious cowled and ready for a game of lightning tennis.

Dooku as the phantom menace doesn't make any sense it adds nothing to the character.

I'm a real advocate of the deluded manipulated renegade Jedi Dooku because it makes real sense (it should have been Qui-Gon's arc).