Given Facebook's extensive data management capabilities and large user base, I suggest creating an "Intelligent Personal Sports Planner." This product would utilize artificial intelligence to comprehend user preferences, recommend relevant sports events, send reminders, and connect users with friends who share similar sports interests, thereby enhancing social interactions. Additionally, the planner would offer tailored articles, highlight videos, and upcoming match notifications based on user interests, effectively creating a personalized sports digest for each user. Furthermore, it could integrate with Oculus, Facebook's virtual reality platform, providing immersive 3D sports experiences for premier league matches or internationally recognized events. This initiative would boost user engagement and likely increase the amount of time users spend on the platform. The monetization strategy could include a freemium model, advertising, collaborations with sports media companies, or subscriptions for VR content. As a product manager, it’s crucial to ensure that these new features align with Facebook's existing structure while exploring potential collaborations and profitability opportunities when addressing this type of proposal!