Ian McDiarmid (born 11 August 1944) is a Scottish actor and director best known for portraying Emperor Palpatine in the Star Wars film series. He has received an Olivier Award for Best Actor and a Tony Award for Best Featured Actor in a Play for his performances. Wikipedia
Continuing with the What If everything after the Original Trilogy was made earlier idea, What if Revenge of the Sith was made in 1992 Plot is the same as the one in 2005. As the Clone Wars ravage the galaxy, Anakin Skywalker starts his journey down the road to the Dark Side and to becoming Darth Vader