Bruce Boxleitner as an older General Kenobi during the Clone Wars...

^ I'd be geeking out so much I'd probably have an aneurysm ;-)

Plus anybody else remember walking out of the cinema after TPM thinking "George, why in heaven didn't you cast Haley Joel Osment as Anakin!?!"

^ He was the right age and could actually act. He auditioned but didn't even get a callback.

It would be interesting to see a list of who auditioned for all the roles in the PT, to see if there were other better options. A lot of the discarded OT actors are known but they only confirm how great the OT cast was.