This isn't going to be a diverse World Cup, it is a complicated one. Maybe in real-time we'll experience variety of matches not because of the diverse cultures getting involved. Just out of the varying climatic conditions. When the hosting rights for the 2022 FIFA World Cup was given to Qatar the first thing came into discussion is the hot climate condition which makes the audience and players suffer. But they came up with the plan and kept the entire ground in a cool condition. Maybe such kind of technology will be used as variation happens between the countries.
Qatar spent close to $250 billion to host the world cup, because they wanted to showoff their wealth. That is not the case with the three North American countries, because they are not in a good economical situation. But the advantage with United States, Canada and Mexico is that they don't need to construct any new stadiums. They already have enough quality venues to host the games. But even then, hosting a tournament with 48 participants is going to be a huge challenge. And this is the first time in recorded history that such a huge tournament is being organized.