I'm waiting for more content to roll out. Plus if Devil's Third launches soon, and is an even better and more extensive game than Splatoon, I'll get that first instead.
OT: On paper, Devil's Third is a much better online shooter. Think about this: all the things reviewers on metacritic are complaining about Splatoon seem to already be addressed with Devil's Third (content, voicechat, clan system, etc). It's had a whole year dedicated to being polished. Give it a chance people!
I predict NX launches in 2017 - not 2016