One large problem with the “Birth of Darth Vader” scene is that he looks silly with the restraints on his wrists and he has awkward posture, you might just want to use a few shots from here: https://youtu.be/LK58iuqfdxg?t=2m40s
I think I’ll be using those shots even though it’s completely CGI. Darth Vader looks scarier here, I could cut back and forth between the Emperor, the walls being crushed and the video game footage to make a more convincing scene.
Yeah, if you can replace Starkiller with Palpatine in that scene, it would be super cool.