If there's one thing executives at Honda Motor and Nissan Motor need to fix first when - and if - they merge, it's their China business. The Japanese duo's sales have been falling for years in the world's largest car market.

Honda and Nissan signed a memorandum of understanding (MoU) to begin discussions on a potential business integration.

The problem is there is no likely outcome that would leave both companies and their employees better off than they are today.

As Honda and Nissan negotiate the terms of a possible merger, we take a speculative look at what new vehicles could spawn from the unprecedented collaboration.

The mooted Honda Nissan merger and the fallout from leadership change at Stellantis suggests the auto industry must brace for turmoil, where size is a survival necessity.