If my child attempted something as immature as that, I wouldn't even let them play the WiiU. There might not be any more big updates, but most glitches that get found in this usually get patched very quickly, and there was sort of an update right after the last Splatfest that gave more money as a win bonus in TW and allowed people to get sea snails without 'fests, which happened less than a month ago. So they definitely do care about the game. And Nintendo's not going to disable online for Splatoon for many years, games such as Mario Kart Wii and Super Smash Bros Brawl were released in 2008 and had online functionality until 2014. The new game won't be released for a very long time, Nintendo hasn't mentioned anything about a new game, and hardly anything about their new system, and Splatoon tournaments still exist, so it's not like nobody plays it anymore. With the information we have right now, it's impossible to even be sure that there even will be a new game, although it's very likely, since this one was very popular.