I'm not so sure about that either.
Going back to the Chipmunks franchise, those live action/CGI movies have been produced by Twentieth Century Fox, and have given Bagdasarian Productions very, very little creative input, hence why the characters sound and act very differently from the rest of the franchise's titles (like the recent Nick show). Granted, there wouldn't be any secondary company involved, so Twentieth Century Fox could call all the shots they want - including probably bringing in celebrities to dub the characters' voices so the movie will sell better with more recognizable names.