[usual suspect]

Kurt Russell in Guardians of the Galaxy Part 2. I was amazed to watch what looked like a 25 year old Kurt Russell in the beginning of the movie.

[fishtank]

Yeah, but could they get Rocket to play the famous Xandarian harp-sprinkler???

Haha

[Vince Ferrer]

Marvel is doing this a lot. Michael Douglas in Ant Man, Robert Downey Jr. in Civil War. And of course, Princess Leia in Rogue One.

There was an interesting Twilight Zone type show in 1980 called The Darkroom. One of the episodes I still remember was that of a TV anchorman who was in the hospital. Mysterious people came in and filmed him from every angle, and made him recite strange sentences.

Finally, the network's CEO came to the hospital to see the Anchor. The anchor told the CEO he was feeling better and that he could be back at work soon. The CEO turned on the TV in the room, and there was the anchor doing the day's news. He said. "There isn't any need for you anymore. We have a record of your looks, and voice, and software can recreate you now. It's a lot cheaper this way. Of course, you can't tell anyone, so we'll have to keep you locked up here for the rest of your life."