For decades, Coca-Cola’s Powerade existed to fight off US sports drink leader Gatorade, which created what is now at least a $12 billion category, according to BD all-channel data. In more recent years, Powerade all but faded into the background, overshadowed by a challenger called BodyArmor that pledged to displace PepsiCo-owned Gatorade with claims of better-for-you ingredients and an in-your-face marketing voice. That may now change. A year after acquiring BodyArmor and merging it into a standalone unit with Powerade, Coca-Cola is ready to get...