The '68 Camaro had those rear body lines....as did many other muscle cars of that era. It would be ignorant to call this car a "Challenger ripoff".

Why bitch/moan about the new "retro craze"? I don't see any problems throwing a bit of history into modern cars. Obviously the Challenger, Mustang, Camaro, etc were some of the most popular muscle cars in their time. I like to see a bit of the original car in the new designs.