TMBTM said:

I think it's subtle, adds to his character when it comes to his feelings towards the Jedi, Qui-Gon and the Republic as he explains to Obi-Wan in Attack of the Clones, and it doesn't contradict anything.

Welcome!

Not a bad idea but Maybe a bit confusing placing it right after the "master or apprentice?" line. The audience would know that he's not Sidious unmasked (the beard!) but it would lead to think that there's a link. (and could be really confusing if Sidious face is completely hidden through all the movie.) But after all, there is the pan on Palapatine face... that should be enough hint to the audience to not make confusion.

Also adding a new character at the very end of the movie is a bit odd. But why not, and I agree it would add more depth to the character. It would be a nice scene on its own; it's just the moment it is integrate that bugs me a little.

Sorry for my english.

French guy here.

JasonN (and a few other editors like MagnoliaFan) remove Sideous' face:

http://www.youtube.com/watch?v=BgM8GbfjS3A&feature=related

I think the Dooku insert is great for two reasons, one it could work as possible alternative Master and set up Darth Tyrannus for the second and third parts but also it could be seen as the beginning of Dooku's fall with the loss of his former apprentice due to the inaction of the Jedi.

So it is actually a rather radical change.

It might be possible to create a line (from sampling elsewhere) where Dooku says something along the lines of "Goodbye my old friend".

I think the Episode One bit in the title removes or plays upto the any confusion the audience might have (it's safe to assume that they will know that other episodes exist).