Analyzing Mechwarrior’s legal issues

Earlier today the internet was set ablaze as Harmony Gold sent a Cease and Desist order to IGN, stating that the trailer for Mechwarrior included imagery that infringed their copyrights.

What is the story behind this legal issue? Does the mech in the trailer really infringe Harmony Gold’s copyrights? What will happen now? Here’s an in-depth analysis.