The project ArenaMind was built for the Google GenAI Hackathon, with the goal of transforming the experience of hosting the FIFA World Cup 2026 using Generative AI. The challenge was to imagine how AI could improve the event, and the solution went beyond creating a simple chatbot. ArenaMind is an AI-powered platform designed to assist both fans and stadium operations teams in real time, with a focus on reliability during high-footfall events. The platform combines AI-powered decision making with structured backend logic using Google Gemini function calling. For fans, ArenaMind offers a range of features, including a multilingual voice and chat companion, QR e-ticket awareness, and real-time food stall and restroom queue monitoring. The platform also provides dedicated wheelchair and step-free routing, making it more accessible for all attendees. For organizers and venue staff, ArenaMind offers interactive crowd congestion heatmaps, predictive crowd overload forecasting, and a natural-language operations assistant. The tech stack used to build ArenaMind includes Google Gemini, TypeScript, React, Node.js, PostgreSQL, Docker, and SOLID Architecture. The project demonstrates how Generative AI can create meaningful impact beyond conversations by improving accessibility, navigation, crowd management, and operational efficiency for large-scale live events. The success of ArenaMind highlights the potential of AI to enhance the experience of attending major sporting events, and its features could be useful for attendees of the FIFA World Cup 2026.