You can already do that with reference images and even for inpainting. No training required. Also no need to pay actors outrageous sums to use their likeness in perpetuity as long as you do business. The licensing still tricky anyways, because even if the face is approved and certified, the entire body and surroundings would also have to be. Otherwise you basically re-invented the celebrity deepfake porn movement. I don't see any A-lister signing up for that.