The Caddy sedans might lose some of their uniqueness in the process. A new patent filed with the United States Patent and Trademark Office (USPTO) by General Motors shows that an updated version of the Cadillac CT4-V and possibly the CT5-V will sport markedly different rear designs to the existing model. As discovered by CarBuzz, the design patent depicts images of a trunk lid with a spoiler attached - this feature leads us to believe that it's the sporty V models that are being shown. But it's below the spoiler that the most significant change can be ...