i agree with die-jarjar-die that Lucas should definatly not show vaders face at then end if he expects people to watch these in 1,2,3,4,5,6 order...
however master sifo-dyas is right when he says that if people do watch them in that order the OT will look somewhat dated and not have all the magic and surprises it did the first time around...
i mean be honest.. what kid is going to be amazed at the lightsaber fights in ANH or ESB after seeing TPM and AOTC...
i still think he has the whole idea wrong with the order of the movies... although they are prequels, i find the only way the movie will work is if you watch them 4,5,6,1,2,3.... this way episodes 1,2,3 seem sorda like a prologue if you catch my drift...
and for my idea regarding the end to episode III... sidious is shown talking to someone (who's image is obstructed by some sort of object like a pillar, just so it doesnt give away the identity of the person), the breathing apparatus starts to work while a close up of a black glove comes to life and begins to move its fingers...
cue credits