The logo is the same as the Rankin/Bass one! But the "B" symbol is now a "C". And the whole logo are the same colors as Cartman's Color Palate. I saw a picture of Cartman working in a studio, which got me thinking. What if there was a Rankin/Bass Productions logo not only owned by RMA! Entertainment, but also Cartman himself?
South Park for Cartman and his color palate Rankin/Bass for their original logo