There were a few retcons, but the one everyone hates is the Ventress one. I am of the few that think the Clone Wars one explains things in a more logical way. Anyway, Ventress is a Rattatak. So, in the comics they made her homeworld and story take place there. It was okay, but the issue was who trained her as a sith. Also, the arena from the Clone Wars mini show is on Rattatak. It would be weird if she lived right next door. In the Clone Wars, she is from Rattatak, but gets taken away for Jedi training. That answers two of my problems right there. Then, she goes with the nightsisters (who use the dark side). The Clone Wars version is better in my opinion.