The ATS-V And CT5-V Blackwing sport sedans are Cadillac’s pinnacle of premium performance, delivering on world-beating specs, while offering incredible easter egg details that will have even the most particular of personalities peering them over even after months of ownership. Based on our time with a Cadillac CT5-V Blackwing, they drive special, they feel special, and they’re designed special. And based on a recent theme sketch shared to the world via the GM Design Instagram page, that was always the case. The design was created by Robin Krieg, currently serving as lead exterior designer of t…