Well, even if Dooku were to be in TPM, I don’t see where/why you would see the color of Dooku’s lightsaber in the first film. But, him having a blue/green saber in AOTC and then having a red in ROTS is an interesting idea. The new canon has established that Sith have to kill a Jedi and take their lightsabers to get their red crystals, so it would make sense that he may not have had a chance to do so until the Clone Wars. But him having a new saber in III might raise more questions, and doubt there will be much agreement on what color he should even have if one were to change it in AOTC.

I had thought about too. Though I also could see how someone on the Council could begin to truly see the failings of it more than most. Especially after he personally witnessed the Council failing to take the Sith threat seriously, resulting in his old apprentice’s death. I also feel that would be the most natural place for him to be, because I think him appearing anywhere else would either be too difficult or just raise more questions within the film. He’d just be a cameo, we don’t need to know who he is or what is important about him and it won’t raise any questions within the context of TPM, but it’ll out a little something that goes towards the plot of AOTC in a retrospective way. Then again, Dooku laments in AOTC about having never crossed paths with Obi before, so you would have to change that. I don’t know, I just think if there isn’t a natural way to insert him into the Council, then he shouldn’t be in TPM at all.

And if we were to swap Yaddle with another Jedi, why not Dooku? It would serve the story and be an interesting cameo, more so than any other Jedi. I just think it would be difficult to really do. I’m not sure if anyone on here has the technical skills to make such a change, either.

While I do think this is an interesting discussion and be up for consideration since it would add connectivity to the films, I also don’t think it is the most crucial change either. While it could be a nice connection, it isn’t necessarily resolving a previous issue, just improving the connectivity. Here are some other changes I think that would be useful, but would require some vfx work.

Why is the tech level so different from OT? / I think it would be interesting to overlay more retro ship displays over the current ones in the prequel films to help alleviate the tech difference between trilogies. I think nicer looking ships are fine, but even in the sequel trilogy, the ships interfaces are more retro. I’m not very familiar with motion graphics myself but I think this would be a good way to learn too.
Why was it never explained why Jedi Master “Sifo-Dyas” ordered the clone army? / Some effects may be necessary to alter the Prime Minister of Kamino’s mouth movement to help sell this.
If Chewbacca always knew the Jedi were real, why didn’t he ever tell Han? / I think Chewbecca should either be photoshopped out of his ROTS scenes, or be recolored to imply he is a different wookie. I think someone like paja would be capable of this if he was interested. Maybe we could change him to a “silver” wookie? wink wink
Why does Yoda run away from his fight with Palpatine? / It always kind of bothered me how it seemed like Yoda just sort of gave up in their fight. If we keep it, I think it would be nice to hear (or see) clones entering the senate chamber, maybe see some blaster shots or even hear Yoda break some bones when he falls.
What’s up with Anakin’s yellow Sith eyes? Why does Anakin momentarily get them but we don’t see Dooku, Luke when he almost killed Vader, or Kylo Ren ever have them? / I suggest just changing his eyes back to their normal color.
Why does the Death Star take so long to build?/ Since Rogue One established that the dish was one of the last pieces placed on the Death Star, maybe the DS at the end of ROTS could have its dish at the equator to infer it is a prototype, or replace it with a different early DS design (maybe just the circular frame without a dish)
Why does Anakin’s lightsaber seem to change color between the movies? / Decide on a consistent hue for the saber and maintain in within each film.
Why does Kylo Ren’s scar look so different than it did at the end of TFA? / Ridley is handling this with his edit.