What is the connection between Senator Palpatine and Darth Sidious?
According to Cinescape Online’s Insider, Rick McCallum, TPM’s producer set the record straight on Sidious’ identity (also check Question 3I) in a British magazine called Starburst by saying “Ian [McDiarmid] is the Phantom Menace. He’s not the Emperor yet [in The Phantom Menace], but he is a Sith Lord. He’s also Darth Sidious. That’s Ian in the robe.” George Lucas himself has stated in a USA Today article that the outline for Episode II includes the story of Darth Sidious rising to power in the senate and becoming emperor. We all know that Senator Palpatine and the Emperor are one and the same from before and know it is he that rises in power in the senate.