We don't need prequels. The original trilogy works quite well by itself. Nobody ever needed more Star Wars beyond that. If only we'd all realized that way back. It's been a hard-learned lesson. Six-movie saga, nine movie saga, twelve movie cycle... all a load of bull. The trilogy is a self-contained story that works by itself. The rest is just backstory that never needed films. Sure it would be nice to see how Anakin REALLY turned into Vader, but it's not necessary. From the OOT we can gather that he was a good guy who was corrupted by darkness probably by Palpatine (who else?) maybe through anger and hate and turned probably sometime between the twins' conception and birth and that sometime after he went evil he got all fucked up and became "more machine than man", complete with bionics and a breathing mask. He was probably associated with the emperor around the time the twins were born and at some point after he went dark he worked for the empire hunting down the jedi and rose to an important position in the empire. Before he went evil, he'd been a clone wars vet, a powerful jedi knight and a good friend to Kenobi, who was a general in the clone wars and served Leia's adopted father in them. Jedi knights fought in the clone wars. Yoda trained Kenobi as a jedi and Kenobi took it upon himself to train Anakin and fucked up. The republic was replaced with the empire after it had stood for at least 25 thousand years, with the jedi as its guardians for 25 thousand years, and in the end the jedi were hunted down and killed off for the empire, so by the time of ROTJ there's no jedi around except Luke. Owen Lars wasn't keen on Anakin fighting in the clone wars. The republic had a senate that was probably pretty important in its government and the senate continued when the republic became the empire. The empire may have come in roughly around the time the twins were born. Leia and Luke's mother survived until Leia was small and then died and was obviously a nice person but sad. Leia was adopted by the Organas on Alderaan, who were presumably Alderaanian royalty. The twins had been hidden when born so the emperor wouldn't get them and Vader may not have known about them, and he certainly didn't know about Leia. Seeing as the coming of the empire was the dark times, we can assume the republic was the ok times and was basically good. Anakin was a great pilot when Kenobi met him and we'd be within reason to assume he was an adult or near-adult at the time. A lot of things are either said outright in the OT or implied or suggested and more we can guess, leaving us with a good picture of the backstory (not necessarily the exact backstory Lucas had, but at least close to it, and definitely a backstory that is suggested by the films and which works for it). So from the original trilogy we can extrapolate all the backstory we need for the OT. It would certainly have been nice to have a more detailed picture and answers to some questions, but the trilogy works without that. Prequel trilogy unnecessary.