5: Chevrolet Caprice (2010-2017)
When the revised Caprice was announced, the automotive press was all over it. After all, the Caprice line was a historic part of GM discontinued in 1996. The new model was revealed to be a Law Enforcement only model, but the examples have since made their way onto the market. GM missed a big opportunity by not releasing the Caprice back to the general market because many people have been waiting for a modern Caprice (via Auto Trader).
The Caprice was a stripped-down car with no personality, and Ford already dominated the law enforcement market and Dodge. The Caprice would be discontinued, and the car was never brought into the main lineup. There is no doubt that GM has missed an opportunity with this car and the Impala. Neither car was able to grasp onto the loyal following that would love to have a modern V8 engine powered sedan. The folks at GM think there is no market for it.