But, perhaps the final chapter was the Camaro vs. Mustang wars, culminating in the ZL1 vs. GT500.
http://www.autonews.com/apps/pbcs.dll/article?AID=/20120729/RETAIL03/120729892/1018
http://www.autonews.com/apps/pbcs.dll/article?AID=/20120729/RETAIL03/120729892/1018