GL has said that the reason anakin turns to the dark side is that he was "tricked." When you think about it, there are two and only two reasons for TPM to have been set 10 years before AOTC. (Personally, I think the movies should only have been a couple years apart, just like in the OT) To show a pod race (it wouldnt have worked well if Anakin were older) and to show anakin and his mother in slavery.
In a way, Anakins mother would not have died if she werent a slave. I think at some point in Episode III, Anakin will want to free the slaves. The Jedi will be too absorbed in the Clone Wars to bother with it. The Jedi forbid Anakin to love, they forbid him to free the slaves. Sidious will tell Anakin the Jedi were responsible for everything and that HE wants to form a new government to bring peace and order to the galaxy: No slavery.
Sidious will possibly offer Anakin to turn to the dark side and strike down dooku and take dookus place at his side ala ROTJ. Anakin will win and take dookus red light saber, turning to the dark side.
Anakin will think he can balance the light and dark sides and he will try to remain so it appears he is still with the Jedi. Obiwan will notice he has a different sabre. Anakin will ignite it and it will be red. Obiwan will say that color is a Sith color. Anakin will say he is a Sith. Obiwan will ignite his sabre and they will go at it.
farfetched? sure it is. WIll it happen that way? Probably not. But i think something along those lines will happen.