It would be very interesting to see clones that come out fine, and a few that didn't quite come out right... I would love to see a few lunatics running around... You could even kinda do a SW version of Sylar from Heroes where he kinda goes off and does his own crazy rogue thing. Wow...Just had a thought......

What if Anakin has a clone made of him, and it's a known thing at one point in the story... and one of the two becomes vader but you ASSUME it's the crazy lunatic clone, when in reality it's the real Anakin.... But, that's only really a good idea if it's conveyed in ROTJ as well... But maybe there is something that could be done there.