Meta Platforms CEO Mark Zuckerberg has never shied away from big moves, from dropping out of Harvard University to work on a fledgling social-media company to changing the name of that company even after it crossed $100 billion in annual sales. This week, he may have signaled his largest move yet—a massive multiyear program, probably in excess of a trillion dollars, to build a global network of artificial-intelligence data centers. A trillion dollars is a lot of money, even more than Meta’s Facebook and Instagram can provide, so the company also hired a banker as its new president and vice chairman.