That’s very cool! I have had two ideas on Dooku within the films. I always felt it would be interesting to have him be on the Jedi Council (preferably replace him with Yaddle), even if he doesn’t say anything.
Excellent idea ! Someone was working on an edit that implements Dooku in TPM, observing Qui-Gon funerals from a distant spot and looking angry about the situation. If you add him during the previous Jedi Council scenes (with the possibility to get a close up on him and a montage to make Qui-Gon and him nodding at each other, somehow) it would just be perfect. Had the PT got a “master plan”, Lucas would have thought about it himself 😉