Football is an integral part of Brazil’s historical-cultural process, and tourism represents one of the segments deeply impacted by the occurrence of sporting mega-events. The present study aims to present and critically reflect on the main legacies and impacts that these events brought to the Brazilian population. This paper is based on notes surrounding the legacies put forward for the city of São Paulo. To do this, information gathering lends to suggestions that help situate future planning and organization. The purpose of this paper concerns sociocultural and economic futures and the role of tourism and events for local communities based on the current realities and challenges in Brazil. The article is based on a qualitative approach, where descriptive and explanatory information is triangulated. This study utilizes a range of methods, employing a combination of bibliographic research, documentary analysis, and content analysis to frame the base of the research. Moreover, we use field research techniques such as semi-structured interviews with managers, questionnaires administered to residents, interviews with local representatives, direct observation, and active participation in events held at the main stadium associated with sport mega-events in São Paulo, namely, the Neo Química Arena. Noteworthy findings demonstrate a discrepancy between the objectives pursued by host city planners, who strive to maximize the positive legacies encompassing local infrastructure, stadiums, and the city’s image, and the experiences reported by local residents, who have encountered negative impacts and legacies resulting from the same sport mega-event. These adverse effects include issues such as flooding, gentrification, exclusion from decision-making processes, and real estate speculation. Stadiums are considered the greatest tangible legacies of sport mega-events, although their construction and maintenance costs are questionable. The participation of local residents seems to be essential in the promotion, knowledge, appropriation, belonging, support, and transparency in all phases of the mega-event planning.