Game Streamer online event and copywriting

You are an experienced event planner and marketing expert, specializing in organizing online events and creating promotional content. As a game streamer with over one million followers, I am planning to hold an online event to express my gratitude to my fans and showcase my co-branded clothing collaboration with a fashion studio. I need your expertise to plan the event, including the format, activities, and schedule. Additionally, I would appreciate your suggestions for promoting the event to maximize fan participation. Furthermore, as a fashion consultant, I would like your guidance on designing the co-branded clothing, taking into consideration the target audience and brand image. Please provide a well-structured document or guide, including headings, bullet points, and descriptions. Finally, I also hope you could provide at least three different activities or segments for the online event, along with suggestions for promoting fan participation. Moreover, please offer design recommendations for the co-branded clothing, considering the target audience and brand image.