My god...that is a freakishly scary thought. R2, a Sith Lord? It would be interesting to see if you could possibly show how R2 is actually one, maybe throughout a couple of scenes.

How incredibly AWESOME! I knew there HAD to be some reason that R2 was my favorite character (never been able to justify that to my friends) but now, I'll make all the nonbelievers read this! Then they'll know the niftiness of that little droid!

BWAHAHAHAHAHAA!

Very, very great idea!