GL has stated that he wanted anakin to have a scar to show that he has been through battles in the clonewars. you know, to show that he was born again hard. the comic book writers came up with the whole ventress thing which i think is silly. GL talks about wanting to give anakin a scar in one of the docs where they are designing anakin's new look. no real thought or back story behind that one.
http://wbloggar.com/marcelo/images/spoiler-anakin.jpg
see its up the elbow definitely
I was watching the cartoons of season 2 and he didn't have it till after he fought in the battle in the clone wars but Asajj Ventress wasn't there. You see him without a scar then he goes to see padme and he has it and she rubs it. So you don't see her give it to him. Cuz i have the vol 1 DVD and I didn't see it and I don't know what comic your talking about where he gets it but I have heard from a friend who knows a WHOLE lot about star wars and Asajj Ventress. does give it to him. To see what I'm talking about u can watch the clone wars episodes of saeson 2 so go look at it.
Actually. I f you look in Episode III, the scar is healed somewhat, it is logical to assume that time erased it or it was burned off. Clone Wars and the comic have different "interpretations" but Clone Wars never shows him actually getting it. And hes anakin gets his arm cut off, but then he rebuilds it...