I think a stadium should be in a nice area in the city that also offers a lot of other stuff. Definitely should have some fancy hotels around it so people can stay close to the stadium. Then I would say some banging restaurants in all sorts of price ranges, from the fancy Michelin star restaurant to the crappy fast food joint. I think it would be fun to just have an area where fans can hang out outside the stadium and just watch the games, like a fan zone. Vienna opera has something where you can listen to the opera from outside the opera for free, maybe something like that but for sports. And then obviously you need some bars for the crazy fans who want to get drunk. Ultimately you want to make it so that people enjoy being around that area even games aren't on. That way you make it a popular destination and more people watch games and become fans.