Moody's gave a positive review of the potential merger of Honda and Nissan, but former Nissan CEO Carlos Ghosn warned his old employer would face "carnage" if the combination went through.

The Detroit Three are facing an auto industry increasingly affected by the rise of China as demonstrated by the planned merger of Honda and Nissan.

Japanese automakers Honda and Nissan will attempt to merge and create the world’s third-largest automaker by sales as the industry undergoes dramatic changes in its transition away from fossil fuels.