Everyone is going to be doing this. There just aren't any new movie stars. If you want to put butts in cinema seats, you need Tom Cruise or Brad Pitt to sell those tickets and they ain't getting any younger.
Established stars could license the likenesses of their younger selves. Imagine a new film today with a 27-y/o Jack Nicholson? The estate holders of deceased actors could do the same and we'll get new films with John Wayne, James Dean, or Marilyn Monroe, faces that even today's teens recognize.
The AI tech is improving by orders of magnitude every year.
Bah all fake, they’ll play any woke part “asked” of them.
John Wayne’s time was over 50 years ago.
You do bring up an interesting point. My Mother still goes to the cinema (or did while Dad was alive). I expect that she wouldn’t know, and would be pleased to see “young Jack” still acting.
They could bring back the big "ensemble cast" movies on the cheap. Cannonball Run III, after all these years. ;-)