Rumor has it that a Clone Wars cartoon series was scrapped. However, I wouldn't believe anything until Lucasfilm actually says anything on the subject.
The fact that they're having Hasbro, one of the major licensees and a company that George Lucas owns 10% of launch a toy line speaks volumes. I doubt there would be such a big push for the Clone Wars if there wasn't some kind of cross-marketing in place. The Clone Wars video games aren't a strong enough vehicle to promote and entire toy line.