How the PT should have played out
This is how the PT should have gone:
Episode I - begins with the start of the Clone Wars and develops the relationships of key players Anakin, Obi-Wan, and Padme and ends with a major victory for the Republic
Episode II - Set a few years after Episode I, the Clone Wars draw to a close as The Empire comes into existence. Anakin is torn between his friendship with Obi-Wan and Padme and his distrust of the Jedi Order. Anakin ultimately turns to the Dark Side (mirroring Luke's denial of the Dark Side in Empire Strikes Back) and becomes an agent for The Empire. The movie would end with Anakin becoming Darth Vader (in name but not in appearance) and Padme discovering she is pregnant.
Episode III - Anakin (now Darth Vader and a student of the Dark Side) leads the Jedi purge and realizes he must confront Obi-Wan and Padme (who has secretly given birth to Luke and Leia without Vader's knowledge) who have formed The Rebellion with Bail Organa. Vader inadvertently kills Padme and blames Obi-Wan for him causing her death. Vader and Obi-Wan fight but Vader ultimately ends up defeated and becomes the character seen in the OT.