there’s no way this was not accounted for by his agent or whoever negotiated for him. You can’t even use a photograph of an actor in a movie without negotiating an “image and likeness” agreement.

For example, Crispin Glover sued and got a settlement because they used his likeness in BTtF2 and 3 by making George Mcfly’s new actor look like Glover with makeup and prosthetics. CGI and AI don’t change that at all.