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
When they defeat the empire, a new era arrives for the galaxy and new problems as a reincarnation of the empire commanded by "thrawn" who has returned from his supposed death in the imperial ship along with ezra bridger.