I think that's doable with heavy rotoscoping. As for the as you wish, well, we're screwed there. But yes, I always liked the idea of Vaderizing anakin's gestures.
One idea I had was to make him stare at the space the same way Vader does all throughout ESB (if we got a scene of Anakin onboard a cruiser). But well, that scene doesn't exist, and the only thing that mirrors it is Anakin staring at the Naboo landscape when he dreams about his mother