shanerjedi said:

That's not a bad idea. I wonder if there's some footage from the asteroid chase for Jango's reaction to the hologram. He wouldn't have to say anything. It would all be Siddy. And there just might be a way to put together some dialogue that is spread throughout the prequels where Sidious says: "Geonosis. War. Lead." etc. Or maybe just dubbing in someone else's voice would be more appropriate?

But good idea overall.

Well in my edit, we don't see Jango without his helmet, so I'd need a helmeted shot of him if at all. I really like the idea of inserting the Jason Wingreen "As you Wish" line from ESB after Palpatine gives him the order.

Sidious' face will be blanked out and the voice will be warped (like someone did in a phantom menace edit) so either a cut and paste of Palpatine's dialogue, or someone doing an impersonation will both work fine, I think.