The problem with the tournament is that, if the past tournaments are anything to go by, they require a large amount of people to make a decent sized bracket. In this case, all 8 members would have to be online at the same time to have their match, and in the other tournaments most people never showed up. Although, there's also the fact that most people who signed up in past tourneys only showed up for a day and then disappeared. The benefit with Splatoon is that a good chunk of people (I counted 24) are active and do post on the boards frequently, so I don't think activity would be too much of an issue. Only thing is the wait of actually getting the mode and if people would still be interested.