You still need someone to - you know - act.
Saying deepfakes makes actors superfluous is like saying synthesizers makes musicians superfluous.
Saying deepfakes makes actors superfluous is like saying synthesizers makes musicians superfluous.
I guess such an AI would also be able to write and direct the movie.
But yes, everything you mention up to and including writing and directing can and will be automated to the fullest degree possible in time.