The next Splatfest has been confirmed for Halloween! Unfortunately the theme itself doesn't seem to be related to Halloween...but still, it's Pirates vs. Ninjas.
YES! I didn't win the last Splatfest so I'm glad I won this one. The x6 win percentage does make it much less likely for the popular side to win solely based on popularity, but it's certainly not unlikely. As long as they still win more matches they could still win.