Dozens of new electric-vehicle models are expected to arrive at dealerships in the next few years. We followed eight Wall Street Journal reporters in four countries to see if they, and the world, are ready to make the switch. Pressure is building on General Motors Co., Volkswagen AG and other major auto makers to deliver on their electric-vehicle plans, as investor enthusiasm for the technology has grown in recent months. Despite some coronavirus-related setbacks, car companies in the coming months are expected to unleash a wave of new plug-in models in an effort…