just throwing ideas around.
EP1: Anakin is around 16-17 years old. Qui-Gonn & Obi-Wan discover him and free him within the first 45 minutes of the movie. Pod race sequence could still be in the movie but make it less childish. Anakin is shown as an extremely gifted but volatile young man, passionate but wreckless. They take him back to Coruscant where by some design he meets Padme who is serving as Senator for Naboo. He instantly falls in love with her, but their romance does not develop quite yet. Qui-Gonn is denied permission to train Anakin by the council based on his age, but proceeds to train Anakin regardless. What follows for the next 30 minutes or so of the movie is a series of scenes of Anakin training as a Padawan, focusing on his development as a jedi and as a man. Potential for great action sequences and good character development. Initially Obi-Wan is hostile towards Anakin, which would set up a nice scene with young Anakin and Obi-Wan in a fist fight or something. Throughout this part of the movie, Qui-Gonn would be training Anakin, giving him Jedi wisdom ala Yoda in ESB. Good opportunity for some great quotes. While the main focus would be on Anakin's training, the backstory would be the impending threat of the Clone Wars and the return of the Sith. The third act of the movie would culminate in the start of the Clone Wars, and have Anakin put in a situation where he is required to use the training he has learned to either save someone or do something heroic, i would say for the sake of the romance side of the story, have it be him having to save padme while darth maul attacks qui-gonn and obi-wan, but have him have to kill someone along the way to do it, tempting the dark side.
the movie would end with the Clone Wars in full gear, kinda like the way AOTC ended. Darth Maul lives, killing Qui-Gonn then getting defeated by Obi-Wan but surviving. The council, seeing that Anakin is fit to be a Jedi, allow Obi-Wan to take him as his Padawan learner.
EP2: The Clone Wars. Anakin is 20-22 years old. Focus is still on Anakin, and this movie will have crazy action sequences. Show Anakin doing amazing Jedi **** with Obi-Wan, establish why they are legendary Jedi. Some awesome pilot sequences, lightsaber battles, etc. On the romance side of things, have Anakin and Padme get together in the first 30 minutes of the film and then show all the troubles and obstacles they must face to keep their love secret and alive for the rest of the movie. Develop the relationship btwn Palpatine and Anakin as well. The final battle of the movie would have Obi-Wan in a rematch with Darth Maul and Anakin killing Count Dooku.
EP3: The third movie would be similar to ROTS, with the focus being on Anakin's fall to the dark side. Palpatine manipulates Anakin into becoming Darth Vader, but it would not be as sudden as in ROTS. Rather the progression would take time, over the course of the first 1 1/2 of the movie. The tipping point would be when Mace Windu realizes Anakin is falling to the dark side he tries to arrest him. They fight and Anakin kills him, cementing his descent. Yoda vs Palpatine, Anakin vs ObiWan. Donedees.