you can kind of tell that the emperor at this point has already started to plot vader's replacement. maybe if the office did feature in the conversation. there could be a brief pause for both the characters after the conversation is over, ie, holograms disappear, then we see the emperor just think, then we see vader just think seperatly. i like how they immediatly are planning to betray each other. the only flaw between the rule of the 2, is that now they have agreed to turn luke, they have practically just told each other that they are going to have to fight for mastership.
oh george, why do you have to complicate things? it should be the rule of the few.:P
i always liked the idea of replacing sidious with dooku in TPM, and making maul grevious. the jedi would always be expecting 2 sith, but sidious was cunning and had 2 apprentices perhaps?